Mimitabu No Riyuu耳たぶの理由; A Reason for Earlobes; The reason his earlobes redden

From Bushido Angel Adventures Yamaguchi is a notorious womanizer. Some men admire him; others can't stand him. Ishikawa is definitely one of the latter. Nevertheless, when Yamaguchi's latest girlfriend dumps him, Ishikawa jokingly offers to comfort him with his own body. Unfortunately for Ishikawa, Yamaguchi takes the offer seriously. And, to make matters worse, Ishikawa discovers that he can't say no! (by presencedear).