Ashita no Kimi wa Koko ni Inai

Also known as: あしたのきみはここにいない, Ashita no Kimi wa Kokoni Inai, The you of tomorrow is not here

by Haruhi Sakiya, Kotetsuko Yamamoto

After failing Japanese history, Mio was force to go to extra cram classes. Finding out that his Japanese history teacher, Fumichika, was quite understanding and kind, Mio couldn't help but felt an attraction towards him. After he confessed, Fumichika tells him that his feelings won't last, but if he can accept the risk of not having his feelings reciprocated and may end up hurt, they can start a physical relationship. But when Mio desires more... (Source: Bliss)