Haruta and Rio have been together since childhood and always take care of each other. The girl has been waiting for a declaration of love from the guy for a long time, and he wants to confess, but still can’t make up his mind. While walking together, the couple meets their common old friend Kaito, who immediately appreciated the matured Rio. He turns out to be much more decisive than Haruta and, finding himself alone with the girl, immediately gets down to business.