Childish Rui Sasaki is 25 years old, single, and a virgin. All she wants is to fall in love like everyone else and have sex with a nice boyfriend! While lamenting over this during drinks with her childhood friend, Naoko, she met Ritsu, a modest and handsome man. He was kind enough to listen to her complaints and take care of her drunken self. Suddenly, an intoxicated Rui falls on top of Ritsu and kisses him...?! For two beginners in love, each with their own issues, is it possible for love to start with sex? A pure story of two people in a complicated love affair is set to begin.