After returning from studying abroad, Manabu becomes lazy, spending all day playing video games. His father, Toru, is the principal of a university. Manabu is set to become a lecturer at the university in the future, following his father's footsteps, so he feels no need to make an effort. Toru believes that after getting married, his son will change and become more responsible, so he uses his influence to arrange for Sora, the granddaughter of another faculty member, to date and eventually marry Manabu. Because the Osawa family is prestigious, Toru does not allow them to have sex before marriage. After a year, they officially become husband and wife. However, right after the wedding, Manabu has to go on a business trip for five days. On their wedding night, he is eager and excited to finally make love to his beautiful wife. But before anything can happen, his penis goes soft. Sora consoles her husband, saying they have plenty of time. The next day, when her husband leaves, Sora returns to her room and masturbates to relieve the year-long arousal. Suddenly, her father-in-law appears, revealing his true intentions. He arranged for Manabu to marry her so he could freely take advantage of her beautiful body...