It's not confirmed, but there's a popular theory that this Bruno Mars song might have been inspired by Attack on Titan.
I don't watch a lot of anime myself, these days, or read much manga. I have several manga series:
The Stranger by the Shore, by Kanna Kii
I Hear the Sunspot, by Yuki Fumino
La Esperança, by Chigusa Kawai
There's also Wandering Son, by Takako Shimura, available at the local library. It isn't Yaoi or BL, but it involves two young students who discover they might be transgender.
Apart from that, every manga/anime I have is mainstream, for now.