Tooru, who has become the president of a university, is completely disappointed in his son Gaku's lack of ambition. Thinking that things will change if they get married, he forcibly sets up professor Oshima's niece Sora as an arranged marriage partner, but... In fact, the person who was targeting her was none other than Toru. He pretended to be a strict father and forbade them from having premarital sex until marriage. A year later, Tooru sends Manabu on a five-day business trip, and he has been there for a long time.