Pls help me find

This is one of the best isekai manhwas out there.
Ok so both ml and fl get isakaid into a game they used to play. ML is rank 1 and Fl is rank 2 in the game. They identify each other early on and team up together to level up. They both are fiances in the story . Their chemistry is SUPER DUPER cute and the ml loves teasing the fl calling her rank 2.
Ml has black hair and fl has red hair.