[Reducing Mosaic]ROYD-346 The slender single mother who lives next door always acts cheerful, but there's something sad about her —. Yoshino Ishida

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...