Yuki causes a traffic accident while driving and kills his senior, Kozue, who was in the car with him. Apologizing for being accompanied by her father... Kozue's father, Kamikawa, gave her a compensation condition of "to become an adopted daughter of the Kamikawa family instead of her deceased daughter." If you take over the debt, you will forcibly establish an adoption. Yuki is trained from scratch as the daughter of the Kamikawa family. Taking advantage of Yuki's failure, Kamikawa tied him up and committed him.
