In the Funkuro high school AU, Ren seduces Horo in his desire for intimate stress relief.
Ren finds that exercise isn't giving him the stress relief he needs, and something gives him the idea that sexual intimacy is good stress relief too. He goes to Horo as the best option and seduces him with the intention of fucking him. Obviously, things go from FWB to lovers, it's non-negotiable
POWER BOTTOM REN IS IMPORTANT