Reborn at Twenty, I Become Everyone's Darling

Everyone, Cheng Yi Fanfiction, Please

I remember a TV drama crossover story where, after each world ended, there'd usually be a fanfic about the male lead actor from that show. One arc was for "Mysterious Lotus Casebook" or "Immortal Samsara", I can't remember which, but later there was a Cheng Yi fanfic. I forgot to add it to my bookshelf, and now I can't find it...