looking for a BL where MC is hooking up with some popular guy in his college class and his...

looking for a BL where MC is hooking up with some popular guy in his college class and his reputation ain’t good, like he’s totally forgettable to the point it feels like magic. anyway he gets a new step brother who isn’t quite human and it turns out that the MC made some wish to a magical tree or something like that when he was younger and this entity is his step brother there to fulfill that wish. please and ty