A lovely brother's wife, a beautiful butt targeted

Manjiro, the younger brother who was living at his brother's house, wanted to do something about his beautiful brother's wife. One day, when Anna rode her bike and went shopping, Manjiro secretly posted a message board as "a married woman with a desire to be raped." And while he was shopping, he was raped by strangers. However, his frustrated body feels unbearable, and Manjiro, who knows the whole story, plays with his sensitive body when he gets home...