An S-tier boyfriend would be nothing without me

あらすじ

Cora gave Julian everything—her strategy, her loyalty, and a secret he never knew existed. To him, she was just the girl who was always there. So when the S-rank champion humiliates her and chooses someone else, Cora finally walks away. But the moment she leaves, Julian starts losing. Again. And again. What he doesn’t know is that every victory he took for granted may have cost Cora far more than he ever imagined.