Noboru has crossed the line with her sister-in-law Rin. The trigger was my wife's runaway. Rin suddenly came to the place where he was having a lonely evening drink after a couple quarrel. It is said that he came to help Noboru who is having trouble with unfamiliar housework. As a result of believing that word ... I'm trapped. Knowing that Rin's true purpose is to relieve his frustration, Noboru mobilizes all his reason and runs away, but Rin's tenacious temptation that he never gives up begins to discourage his reason.