Himari and Yuzuru, whose houses are next door to each other, have spent their days as siblings due to each other's family circumstances. Yuzuru liked Himari as a woman, but she couldn't confess to her for a long time. One day, Himari finally gets married. If you miss the moment, you will never be able to convey your feelings. Yuzuru thinks so, and dares to confess to Himari, but she is shaken without daring. A short time later, Himari came to a depressed Yuzuru and said. "Do you want to have sex?"