[Two Male Leads] From Which Day Should a Zither Player's Departure Be Counted?

The Protagonist Is the Best! I'm in a Reading Slump, Please Feed Me Some Recs 23333

Looking for stories similar to Everyone Screams While I Smile, the Game Goes Off the Rails While I Sleep. The top is the best, no contest. I want a no-CP story like Erchui Baby's, with a male lead from a male-oriented novel. I’m begging you.