I'm thinking your guy is a sexy straight dude that wants to get with my gorgeous girl so badly that he'll do anything for her. That anything turns out to be doing not so straight things with her gay best friend.
We could make it a love triangle kind of situation or it could be an agreement on the down low between the two boys in a "I'll scratch your itch if you help me with her" kind of thing.
Scenes can be journal or discord, so just let me know what works best if you are interested.