Natural
Japanese title: ナチュラル
Type: OVA
Episodes: 2
Source: Visual novel
Genres: Hentai
Studios: Arms, Triple X
Producers: Green Bunny
Duration: 28 min per ep
Rating: Rx - Hentai

Rumor's spreading of a hot new couple on campus! A professor is giving the sexy swim star some very special lessons. And this teacher's pet is hot to trot and learning all kinds of new tricks!