Trying to find a yaoi help plz!! :3

Hello, I am trying to find a BL or yaoi. I don't remember clearly which one it is, but it's about a dude finding a white snake, and it turns into a dude at some point in the comic. There's also another scene in an elevator with another dude who can turn into an animal too??? It's like a love triangle?? if i cant find it here, does anyone know anywhere else where it might be? (If somebody knows what I'm referencing, that's it.) Your help is much appreciated >v<.