Koizumi loves Rina, and Rina, though she loves Koizumi, but... So, yes, she beats him, but she doesn't let him (it's already been played somewhere). And then our hero without pants manages to save (by accident) his lover's best friend and Kumi (she is the best friend), who also likes Koizumi, thanks the rescuer in a familiar way. And then both friends (one by one) find themselves in the lair of (ahem, artistic exaggeration) rapists, where they... well, that's... Will the hero manage to save the girls?