No Romance, Everyone's Favorite (Loved by Men and Women), with Everyone Secretly Pining for the Protagonist 无cp，万人迷(男女都爱)单箭头主角

I really want no CP, with no sudden romance later on. Preferably, there should be someone with a dark, unrequited love for the protagonist, and the protagonist shouldn't return their feelings. A side character's one-sided crush on the protagonist is fine. Historical, modern, quick transmigration, anything goes.