Orgasm Detection App: Nonstop Cuck Alerts

Yuuma’s girlfriend, Yuzuki, can be pretty tough to read for most people. She likes to play it cool, but he’s close enough to her that he can pick up her subtle hints. The only thing he can’t tell is how he’s doing in the sack. A friend tips him off to an app that will help him know when she’s having an orgasm, but Yuuma gets suspicious when he starts getting alerts when Yuzuki’s away…