Project S The Series: SPIKE -
http://mydramalist.com/23888-project-s-the-series-...It's airing right now and it's subbed on the official youtube channel too.
It's about a high school mens volleyball team. Could be BL or not, I'm not sure. It's not focusing on romance (yet).
Usually I don't watch Thai series (not that I hate them at all but just because) but this one seems really well-produced
and this Project S will have other sports series as well: skateboarding, badminton, archery
but they're still filming and airing the volleyball one.
I guess if you have seen Hormones, you'll probably like this one because they have the same director and some actors.
+1 Thumping Spike
+1 As One