Satoru's crotch is itchy. His mother Kanna can't stand to see him like that, so she lends him some delicate cream, but now Kanna's crotch is also itchy. When he goes to Satoru's room to get the cream back, he is unfortunately out already. After searching around, he manages to find the delicate cream himself and rubs it on his crotch, but... Far from the itch going away, his body starts to get sweaty, and Kanna, confused, ends up rubbing more on...