Despite swimming about as well as a sack of hammers, Iori's been drafted into Izu University's diving club. The club's beer-soaked parties bring out his inner beast, but how will he do once he's actually underwater and face-to-face with the grandeur of the sea? And swimming ability might be the least of Iori's troubles when he awakens from the club's latest drunken revel next to a beautiful woman he doesn't recognize...