Keiraku no Houteishiki Level-C  

Level C, Pleasure Education Level-C, 快楽の方程式 LEVEL-C, Level-C

Mizuki, a fashion model, has an attractive home. Meanwhile, Kazuomi's girlfriend recently left him, leaving him in search of someone to share living arrangements with. While walking down the street, he comes across Mizuki and finds him appealing. He proposes that they live together in exchange for sexual favors. Initially skeptical, Mizuki eventually agrees when Kazuomi follows through on his offer at their apartment later that night.