The one who moved into the apartment next to mine was a single mother named Karen. The two of us started talking due to some chance encounter. A lonely student from the countryside with no friends in Tokyo and a single mother, Karen, with no one to rely on—we drew closer to each other. As our distance from Karen shortened, eventually we lay together. But Karen's ex-husband's existence threatens the lives of her and the kids. I'll do it for my happiness with Karen...
