Manabu became lazy after returning from studying abroad, spending all day playing video games. His father, Toru, is the principal of a university. Manabu is expected to become a lecturer at the school in the future, following his father's footsteps, so he doesn't need to make an effort. Thinking that his son would change and become more responsible after getting married, Toru used his influence to arrange for Sora, the granddaughter of another professor, to date and eventually marry Manabu. As the Osawa family is prestigious, Toru forbade them from being intimate before marriage. After a year, they officially became husband and wife. However, right after the wedding, Manabu had to go on a business trip for five days. On their wedding night, he was eager and excited to finally be intimate with his beautiful wife. But before they could start, his penis went soft. Sora comforted her husband, saying they have plenty of time. The next day, when her husband left, Sora went to her room and masturbated to relieve the year-long sexual frustration. Suddenly, her father-in-law appeared and revealed his true intentions. He had arranged for Manabu to marry her so he could satisfy his desire to possess her beautiful body...