Yuta Yamano had an older childhood friend, Natsuka Shinomiya, who had a pure relationship with her. She used to be a tough summer flower who hates even her off-color humor, but Yuta was worried that she has become strangely aggressive these days. The two of them finally had their first experience during the summer vacation. However, Natsuka wasn't satisfied with her actions with Yuta, and she called a man famous for Yarichin that day ... staff