Muroto Kurota is tanned gal Shiina Chieri's private tutor. As a daily reward for studying, they have all kinds of sex (excluding penetrative). When Chieri gets stood up by her boyfriend on Christmas Eve, she tells Kouta, who just happens to be there at the time, that she's lost her will to keep trying in life. Hearing this, Kouta is filled with sorrow and anger, and crying, he confesses his love for her. Now aware of Kouta's feelings, how will Chieri respond...?