Kawakami Misao has been married to Miwako's older brother for five years now. The sister-in-law duo, who teach at the same school, have a bond as close as real sisters. ... But their relationship begins to warp due to a student's peculiar fetish. The student's name is Nishiya Ryo; he normally acts like an ordinary male student. However, when his sadistic desires run wild, the daily lives of these young female teacher siblings plunge into a swamp of lewd jealousy and carnal lust...
