A brother-in-law and a brother's brother who live in an apartment run by their parents.In contrast to his serious and hard-working brother, the taciturn, middle-aged NEET brother feels abnormal and sexual feelings for Saki, who is her brother's wife (her sister-in-law).One day, when Saki got wet and see-through in a shower, the trigger was that her younger brother, who saw it, subjected his sister-in-law to a bizarre humiliation. At some point, I felt my body heat up in the abnormal situation of stealing.