Oh yes definitely!! I'd say... Dream Theory and Old Man Yaoi have a similar kind of love that - while not exactly healthy, certainly works for them and the world around them lol

Old Man Yaoi AU AFO takes a bit to accept it though, keeps lying to himself, saying its just a game. He can stop any day. Dream Theory AfO was able to fuck it out with Toshi in his dreams and they kinda just run off together in the end without any drama

Fantasy AU AfO loves Toshi soooooo much he decides that the best, most ultimate form of love he can show is to devour Toshi so they can be One, fully and completely lol

Demon AU AfO has a fondness for Toshi, but lacks any real emotional depth for him. Toshi will die and he'll just shrug and move on to the next plaything

Aaaand genderswap AU AfO also has a genuine love, and will do anything to get Toshi's attention. Just for a touch. Just for the sound of her voice. Just for even a glance. A n y t h i n g.