I think the guy who started this thread is looking for shoujo ai, not shounen ai first of all. And yeah, I don't know about the rest but Kakyuusei is based on an ero game. Hehe, imagine the shock if these horny men get a boat load of men-to-men love making.
There is a zero percent chance that an anime based on ero games will have shounen ai elements in it because their target audience will steer clear of it .
Now a Tatu anime on the other hand, that's gotta have lesbian action to the max. The art seems very nice too. They look a million times better in the cartoon than in real life, but of course who wouldn't.