Help me find this BL

Ok so there's this BL I read a long time ago and forgot to put in my read and I want to find it. Basically I'm pretty sure this guy wakes up in another world and he is like a side character of that world?? And he gives the main guy of that world a love potion and they fall in love, but I think he reveals its a spell and then They fall in love for real?? And the guy he gives the potion to is a prince? Idk I read it a long time ago but now its bugging me and I wanna find it. PLZ HELP