"I'm pre-menstrual, so I just want to fuck anyone right now...!" "Wait, what is this voice??" It's the inner voices of the girls! A girl's true feelings are a forbidden territory for boys, something that should be impossible to know. But what if you could hear their raw, honest inner thoughts...!? A male student gains the ability to hear inner voices through a trivial incident. He's not the popular type; in fact, he's a background character who isn't even considered a romantic option by the girls. However, there are actually moments when even girls like that are in heat! Specifically, those gaps in time when they're pre-menstrual or horny because they can't fuck their boyfriends. If you can hear their inner voices, you can pinpoint and target those exact moments! A perfect hit every time! Actions that would normally be treated as sexual harassment are upgraded to the best possible acts that are welcomed in these moments! So, by listening to their inner voices and making his move at the best timing, he fucks girl after girl! He can even get with the female teachers!