After six years of life as an author, Yoon Seri hits a new hurdle: writer’s block. Determined to overcome it, she sets her sights on a new genre, R-rated literature, only to find that her lack of experience is holding her back. Her search for a sexual sensei leads her to Lee Siyoon, a man willing to show her the ropes in more ways than one. But after her first taste of sexual liberty, she finds she can’t stop thinking about it. After unexpectedly reuniting with her childhood friend-turned-neighbor, Seri realizes there might be more than one way to break this writer’s block after all…

After Rei’s parents leave him to live alone in their country house, he meets with his childhood friends Midori and Shiho.