The Perks of Being a Side Effect.

It's a story of boy meets girl. Kyou - solemnly depressed, broken without reason in all his ways - and Nana - enigmatic and charismatic, whilst holding all her secrets. Kyou moves from the big city, Nagano, to a small, seclusive town on the outskirts of Tokyo in order to get away from his overbearing parents. There, he meets Nana and their story takes off from there.