A free app for Android, by Aniplex Inc..

227 音楽の時間 is a music game for Android. The game has a collection of songs, which can be played on your smartphone or tablet. 

The game has a collection of musical scores, which can be accessed by tapping the music notes on the screen. Every time you tap a note, it will play a corresponding sound. If you tap a musical score, it will play the song that is associated with that score. If you tap the “Play” button, it will start playing the currently selected song.