Kana and Yusuke have been in love for a year. Yusuke decided to propose to Kana on their 1-year anniversary. However, Atsushi – Kana's ex-boyfriend, found her home address and came to meet her. With a video recording of their intimate moments from the past, he threatened and forced Kana to have sex with him. Due to a lack of sexual intimacy from her new boyfriend, Kana quickly fell into her own desires.