サンキューコンプレックス！

School during the hot summer means swimming classes. In his paradise, Eiji Okazawa would be surrounded by topless hunks in the pool if not for one problem: he is deathly self-conscious about his inverted nipple. Trying to hide his little secret, Eiji skips swimming class. Much to his delight, Satoru Yuzumura is also playing hooky. Yuzumura's secret reason being: trying to hide his inverted nipple. After discovering this, Eiji is beyond thrilled and befriends Yuzumura and proposes a secret nipple training pact to help each other "fix" their nipples and rid their inverted nipple complex for good. (Source : Futekiya)