Soredemo Tsuyoku, Daitekure.

One day on the way to school, Akio feels sick due to bad food he had eaten. Unfortunately he pukes on honor student Yanagisawa's uniform and passes out after that.
To make him pay for the ruined uniform and to keep him quiet about Yanagisawa's bad personality, Yanagisawa takes a picture of Akio in an explicit position. Still, this picture he took makes him feel hot whenever he looks at it.