Saw a poster of this at an 18+ anime convention section and decided to see it. for me this was a cute "I won't take anyone else's seiki but yours" hentai until the damn futa sensei's was ok too... in the first half it was built up that they love each other, they are childhood friends and so on, they will dedicate themselves to each other but then they just have a three-way. You do got the impression the mc would fuck the sensei the moment they are introduced though. Asides from these 3 characters everyone else is a background character but that's okay fora 16 minute episode.