Kyun to shite, Yamagami-kun!

Taiga and Yamagami are childhood friends who are as close as brothers...or so they were. Yamagami-kun used to be a bit clumsy, but since he transformed into a high-spec, elite glasses guy, their relationship has become strained. "Oh, I wish I had a kinder, cuter female childhood friend." Did Taiga's wish come true, or was it a whim of God? Yamagami-kun has been cursed with the following: "If he sneezes, he turns into a woman" and "If he feels excited, he turns back into a man." (Taiga-kun is cursed with remaining a virgin for life) The key to this "heart-pounding" lies with his awful childhood friend, Taiga-kun...!?