Level C(快楽の方程式 Level-CKeiraku no Houteishiki Level-C, lit. "Pleasure Education Level-C") is a Japanese manga series written and illustrated by Futaba Aoi and Mitsuba Kurenai. The manga is licensed in North America by Media Blasters. It has also been made into an original video animation by J.C.Staff. It is the tale of a relationship between a salaryman and a high school-aged male model.