Daisuke is a 23 year-old new schoolteacher. He ends up being put in charge of a 3rd grade elementary school class since the previous teacher quit, and in that class there's a girl who's quite a troublemaker-...

Collection of Stories/One-shots: 1. 100 Hearts 2. I Know You Know 3. Our love Is Here to Stay 4. Amapola 5. Tiny Tina 6. Gemini 7-9. Joyful Girl Note: The chapter titles are based on famous music pieces.