一人っ子男児の俺が四つ子姉妹の一人になったわけ (Associated Names)

In the bon festival which had the hottest temperature of the year. Yuki Morishima was working in a humid room with no air conditioning for the sake of a black company. When he tried to take a break he collapse. But when he woke up next, he became a girl, became a baby, became a…