"I'm not sure if I can control myself, because I've only ever fantasized about making love to you hard." Studious nerd by day, beast in bed by night...?! A university administrator anxious to get married, Riko Kurita is suddenly approached by the captain of the university Kyudo Team, Daisuke Shimizu (Nickname: Mr. Serious)."Alright. Let's date." (Despite hardly speaking a word to each other prior, he suddenly confesses?! Not to mention he's 10 years younger and a college student!) The thick tome Shimizu finds in her hands details a written schedule of every day of their future relationship, starting from dating and ending in marriage! (Get married...? These are the words I always wanted him to say...) "Yes, please!" she replies... She's risking it all on this ultra-serious boy!