Kippei always gets dumped by his partners. He happens to meet Sosuke by coincidence who seemed to have been dumped at first glance as well. He offers a one night stand to help him forget. He coincidentally meets him again at a nearby clinic. He ended up being a freeloader and a sex buddy with the doctor. He later finds out that Sosuke suffers from sex addiction and he offers to be his boyfriend initially letting it as a physical relationship.
Prescription for a Lonely Boy Who Wants Love