Tsumugi Akari is living with her Mom alone and they are very close. One day the Mom breaks the news that she found a new partner, and Akari is happy for her. But little did she suspect that the guy is a snake, unpolite, lazy, and bad-mouthed. Akari hates his guts, even more, when the guy became all rapey. But the thing is that Akari came so hard that she feels silly now, not fully understanding what’s going on…