Company man Gaki Hiromasa visits the sandlot where he used to play as a child. He recalls that he left a box of his treasures in a disused pipe, but the land is scheduled for redevelopment. Moguro offers to take Gaki to a very special sandlot which is located on the roof of a skyscraper. The place is filled with adults playing in children's clothes as they recapture their childhoods. Moguro warns him that he must not take any "adult impurities" there. Gaki makes friends with Shizu, but then he meets her later in the street. He is shocked when she says that she works as a prostitute to pay her father's debts...