“This is a story about Sayaka and Masaharu, college juniors, who are about to get married together. Everyone knows Sayaka to be a conservative woman and is saving sex for after marriage. However, Kaneko-senpai, considered to be a reliable senior by Masaharu, has other plans to change Kudou’s mindset. He finally gets his chance after Masaharu cancels due to work and he takes it.