More Than Just Benefits?

Charles and Max, fierce rivals for years, share a drunken night that blurs the line between them. Days later, Charles suggests a reckless arrangement, and Max agrees, driven by his growing, unrequited love. Their secret is further complicated by the fact they both have girlfriends, entangling them in a web of guilt and forbidden emotions.

P.S. I also post this on Ao3 under the same username!