Teekyu has 7 seasons and 84 episodes, but don’t worry, each episode only have a run time of 2 minutes. I’m going to borrow the description for Anime news network for this anime because it’s perfect.
Yuri Oshimoto is constantly baffled by the three queer older members of her school´s tennis club. -http://www.animenewsnetwork.com/encyclopedia/anime.php?id=14613
That pretty much sums up the entire series, queer being used in its original form here. Marimo Bandou, Nasuno Takamiya and Kanae Shinjiou are all members in the tennis club when Yuri Oshimoto joins. The only thing is that they play around more during club hours than actually practicing tennis. Each character has their own quirks and special attributes.
This anime is very fast paced and their talking is so quick that I sometimes had to back up to re read the subtitles if I was tired that day. Definitely try to read it in your mother tongue if you’re following the subtitles because they are fast. All and all I really enjoy this anime but it’s a little off the wall. You’ve been warned.