diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/activity/MainActivity.kt b/app/src/main/kotlin/jackall/overlaymulticounter/activity/MainActivity.kt
index f376290..99c8992 100644
--- a/app/src/main/kotlin/jackall/overlaymulticounter/activity/MainActivity.kt
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/activity/MainActivity.kt
@@ -4,7 +4,9 @@
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
 import jackall.overlaymulticounter.R
+import jackall.overlaymulticounter.db.CounterRealmHelper
 import jackall.overlaymulticounter.service.MainService
+import jackall.overlaymulticounter.vo.Counter
 
 class MainActivity : AppCompatActivity() {
 
@@ -12,6 +14,14 @@
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
+        if (CounterRealmHelper().getNextId() == 0) {
+            CounterRealmHelper().insert(
+                    Counter(CounterRealmHelper().getNextId(),
+                            "カウンター1",
+                            0)
+            )
+        }
+
         // TODO: RuntimePermissionの処理
         startService(Intent(this, MainService::class.java))
     }
diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/contract/CounterContract.kt b/app/src/main/kotlin/jackall/overlaymulticounter/contract/CounterContract.kt
new file mode 100644
index 0000000..a70ccde
--- /dev/null
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/contract/CounterContract.kt
@@ -0,0 +1,10 @@
+package jackall.overlaymulticounter.contract
+
+/**
+ * Created by matsumoto_k on 2017/11/09.
+ */
+interface CounterContract {
+    fun plus(id: Int)
+    fun minus(id: Int)
+    fun reset(id: Int)
+}
\ No newline at end of file
diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/db/CounterRealmHelper.kt b/app/src/main/kotlin/jackall/overlaymulticounter/db/CounterRealmHelper.kt
index 06d5ccf..000d8c0 100644
--- a/app/src/main/kotlin/jackall/overlaymulticounter/db/CounterRealmHelper.kt
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/db/CounterRealmHelper.kt
@@ -21,18 +21,37 @@
     }
 
     fun plus(id: Int) {
-        query.equalTo("id", id).findFirst().apply {
-            count++
+        realm.executeTransaction {
+            query.equalTo("id", id).findFirst().apply {
+                count++
+            }
         }
     }
 
     fun minus(id: Int) {
-        query.equalTo("id", id).findFirst().apply {
-            count--
+        realm.executeTransaction {
+            query.equalTo("id", id).findFirst().apply {
+                if (count > 0)
+                    count--
+            }
+        }
+    }
+
+    fun reset(id: Int) {
+        realm.executeTransaction {
+            query.equalTo("id", id).findFirst().apply {
+                count = 0
+            }
         }
     }
 
     override fun findAll(): RealmResults<Counter> {
         return query.findAll()
     }
+
+    fun getNextId(): Int {
+        if (query.count() == 0L)
+            return 0
+        return query.count().toInt() + 1
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/service/MainService.kt b/app/src/main/kotlin/jackall/overlaymulticounter/service/MainService.kt
index 5bb350c..8dcd3be 100644
--- a/app/src/main/kotlin/jackall/overlaymulticounter/service/MainService.kt
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/service/MainService.kt
@@ -189,6 +189,7 @@
         if (counterBinding.root.isShown) {
             windowManager.removeView(counterBinding.root)
         }
+        overlayCounterViewModel.onDestory()
     }
 
     override fun finish() {
diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/CounterItemViewModel.kt b/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/CounterItemViewModel.kt
index b484624..feea98c 100644
--- a/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/CounterItemViewModel.kt
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/CounterItemViewModel.kt
@@ -4,12 +4,13 @@
 import android.databinding.ObservableField
 import android.view.View
 import io.realm.RealmChangeListener
+import jackall.overlaymulticounter.contract.CounterContract
 import jackall.overlaymulticounter.vo.Counter
 
 /**
  * Created by matsumoto_k on 2017/11/08.
  */
-class CounterItemViewModel(val counter: Counter) : BaseObservable() {
+class CounterItemViewModel(val counter: Counter, val counterContract: CounterContract) : BaseObservable() {
     val id = counter.id
     val title = ObservableField<String>(counter.title)
     val count = ObservableField<String>(counter.count.toString())
@@ -23,14 +24,14 @@
     }
 
     fun onClickPlus(view: View) {
-        counter.count++
+        counterContract.plus(id)
     }
 
     fun onClickMinus(view: View) {
-        counter.count--
+        counterContract.minus(id)
     }
 
     fun onClickReset(view: View) {
-        counter.count = 0
+        counterContract.reset(id)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/OverlayCounterViewModel.kt b/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/OverlayCounterViewModel.kt
index 9c83f3a..6250afd 100644
--- a/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/OverlayCounterViewModel.kt
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/viewmodel/OverlayCounterViewModel.kt
@@ -1,9 +1,70 @@
 package jackall.overlaymulticounter.viewmodel
 
 import android.databinding.BaseObservable
+import android.databinding.BindingAdapter
+import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.RecyclerView
+import io.realm.OrderedRealmCollectionChangeListener
+import io.realm.RealmResults
+import jackall.overlaymulticounter.App
+import jackall.overlaymulticounter.CounterAdapter
+import jackall.overlaymulticounter.contract.CounterContract
+import jackall.overlaymulticounter.db.CounterRealmHelper
+import jackall.overlaymulticounter.vo.Counter
+import java.util.*
 
 /**
  * Created by matsumoto_k on 2017/11/08.
  */
-class OverlayCounterViewModel : BaseObservable() {
+class OverlayCounterViewModel : BaseObservable(), CounterContract {
+
+    var counterAdapter: CounterAdapter? = null
+    var counterRealmHelper = CounterRealmHelper()
+    var realmChangeListener: OrderedRealmCollectionChangeListener<RealmResults<Counter>>
+
+    init {
+        val items = ArrayList<CounterItemViewModel>()
+        realmChangeListener = OrderedRealmCollectionChangeListener { results, changeSet ->
+            changeSet.insertions.forEach {
+                counterAdapter?.insert(CounterItemViewModel(results.get(it), this@OverlayCounterViewModel as CounterContract))
+            }
+            changeSet.deletions.forEach {
+                counterAdapter?.remove(it)
+            }
+        }
+        counterRealmHelper.findAll().apply {
+            forEachIndexed { index, counter ->
+                items.add(CounterItemViewModel(counter, this@OverlayCounterViewModel as CounterContract))
+            }
+            addChangeListener(realmChangeListener)
+        }
+        counterAdapter = CounterAdapter(App.get(), items)
+    }
+
+    override fun plus(id: Int) {
+        counterRealmHelper.plus(id)
+    }
+
+    override fun minus(id: Int) {
+        counterRealmHelper.minus(id)
+    }
+
+    override fun reset(id: Int) {
+        counterRealmHelper.reset(id)
+    }
+
+    fun onDestory() {
+        counterRealmHelper.close()
+    }
+
+    object Adapter {
+        @JvmStatic
+        @BindingAdapter("android:setCounterAdapter")
+        fun setCounterAdapter(recyclerView: RecyclerView, counterAdapter: CounterAdapter?) {
+            if (counterAdapter == null)
+                return
+            recyclerView.layoutManager = LinearLayoutManager(App.get())
+            recyclerView.adapter = counterAdapter
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/overlay_counter.xml b/app/src/main/res/layout/overlay_counter.xml
index 5e8d1f2..837b4ee 100644
--- a/app/src/main/res/layout/overlay_counter.xml
+++ b/app/src/main/res/layout/overlay_counter.xml
@@ -20,24 +20,61 @@
 
         <Button
             android:id="@+id/overlay_finish_button"
-            android:layout_width="wrap_content"
+            android:layout_width="@dimen/overlay_counter_button_width"
             android:layout_height="wrap_content"
             android:layout_marginEnd="@dimen/overlay_layout_margin"
             android:layout_marginTop="@dimen/overlay_layout_margin"
             android:onClick="@{overlayViewModel.onClickFinish}"
             android:text="@string/overlay_finish"
+            android:textSize="@dimen/overlay_counter_text_size"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
         <Button
             android:id="@+id/overlay_minimization_button"
-            android:layout_width="wrap_content"
+            android:layout_width="@dimen/overlay_counter_button_width"
             android:layout_height="wrap_content"
-            android:layout_marginEnd="@dimen/overlay_layout_margin"
             android:onClick="@{overlayViewModel.onClickMin}"
             android:text="@string/overlay_minimization"
+            android:textSize="@dimen/overlay_counter_text_size"
             app:layout_constraintEnd_toStartOf="@id/overlay_finish_button"
             app:layout_constraintTop_toTopOf="@id/overlay_finish_button" />
 
+        <Button
+            android:id="@+id/overlay_counter_add"
+            android:layout_width="@dimen/overlay_counter_button_width"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/overlay_layout_margin"
+            android:text="@string/add"
+            android:textSize="@dimen/overlay_counter_text_size"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="@id/overlay_finish_button" />
+
+        <Button
+            android:id="@+id/overlay_counter_remove"
+            android:layout_width="@dimen/overlay_counter_button_width"
+            android:layout_height="wrap_content"
+            android:text="@string/remove"
+            android:textSize="@dimen/overlay_counter_text_size"
+            app:layout_constraintStart_toEndOf="@id/overlay_counter_add"
+            app:layout_constraintTop_toTopOf="@id/overlay_finish_button" />
+
+        <Button
+            android:layout_width="@dimen/overlay_counter_button_width"
+            android:layout_height="wrap_content"
+            android:text="@string/reset_all"
+            android:textSize="@dimen/overlay_counter_text_size"
+            app:layout_constraintStart_toEndOf="@id/overlay_counter_remove"
+            app:layout_constraintTop_toTopOf="@id/overlay_finish_button" />
+
+        <android.support.v7.widget.RecyclerView
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:layout_margin="@dimen/overlay_layout_margin"
+            android:setCounterAdapter="@{counterViewModel.counterAdapter}"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/overlay_finish_button" />
     </android.support.constraint.ConstraintLayout>
 </layout>
\ No newline at end of file
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index 8e0090e..dd3b17e 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -6,4 +6,6 @@
     <dimen name="counter_plus_width">48dp</dimen>
     <dimen name="counter_minus_width">32dp</dimen>
     <dimen name="counter_count_width">84dp</dimen>
+    <dimen name="overlay_counter_text_size">10dp</dimen>
+    <dimen name="overlay_counter_button_width">72dp</dimen>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 0d5688e..15e3643 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,9 +1,11 @@
 <resources>
     <string name="app_name">OverlayMultiCounter</string>
-    <string name="overlay_finish">終了</string>
-    <string name="overlay_minimization">最小化</string>
+    <string name="overlay_finish">finish</string>
+    <string name="overlay_minimization">min</string>
+    <string name="add">add</string>
+    <string name="remove">remove</string>
+    <string name="reset_all">resetall</string>
     <string name="plus">+</string>
     <string name="minus">-</string>
     <string name="reset">RESET</string>
-    <string name="reset_all">ALL RESET</string>
 </resources>