'Jitae' is in danger because of 'Taeheon', who succeeded in arresting a large number of gangsters. Ji-tae, left alone, sends countless letters containing sexual harassment to harass Tae-heon out of revenge when all of his sexual partners are arrested along with his collection line. In the end, Tae-heon, whose work is disrupted, becomes angry and checks the sender of the letter... The sender is his high school classmate Lee Ji-tae?!