Trailer Time: Ace of Diamond One thing I'll give Anime and Manga of their American counterparts, is the sports genre. Yes it's basically just Shonen plus sports, but it works. I'd never have imagined that I would give two shits about Tennis until I watched The Prince of Tennis. Event he title is kind of dumb, but I ate that shit up! Ace of Diamond is about Baseball. I'm very interested and can't wait for it to steal my heart away.