Bosomy Backhouse Girl: Mi-yeong, who lives in the backhouse comes between the strong friendship of Deuk-chan and Cheol-soo. Mi-yeong is usually blunt and cold, but in bed, it's a different story. Deuk-chan approaches her with love, but Cheol-soo only wants to remain sex partners with her. Meanwhile, Deuk-chan who loves Mi-yeong had an old sex partner, Hee-jin. Cheol-soo shows interest in Hee-jin. The love story of two youthful men and women begins...