Three years since birth of Mizuho, child with blood of younger brother. Not to mention Emi of the wife, protagonist Hideaki also was doting on the daughter who did not have the connection of blood. The family who seems to be happy at a glance. However, Hideaki kept holding the worry about being sterile now. Though it tries to have a baby every day but the result doesnt come out. One day, Hidema ones real brother who is true father of Mizuho returns home. Hideaki does still not know that Hidema and Emi had before a serious affair. Hideaki to Hidema a prohibited requesting thing is done again. Hideaki ask Hidema to make a second child with Emi.