Manga

This is Punpun Onodera's coming-of-age story. His parents' marriage is falling apart. His dad goes to jail, and his mom goes to the hospital. He has to live with his loser uncle. He has a crush on a girl who lives in a weird cult. Punpun tries talking with God about his problems, but God is a jerk. Punpun keeps hoping things will get better, but they really, really don't.
Punpun has finally reunited with the love of his life, Aiko!
But she isn't as exciting and wonderful as he remembered.
And she doesn't make him exciting and wonderful.
In fact, he thinks they're both terribly banal.
And now they've done something terrible...
Punpun, what do you do when there's no way out?