Mizuki is told that her son may be repeating a year. - No matter what I do, I will make a color scheme so that my son can graduate, but the whole story will be taken by my son's classmate, Ninomiya. - At a later date, Ninomiya, who came up with a trick, came to visit Mizuki aiming for a gap. - When Mizuki is suspicious of Ninomiya, who is grinning, he is showered with shocking words. - "Auntie, do you know what this picture is?"