She poured her heart and soul into designing a hit game for the boyfriend she'd been dating for four years, only for him to secretly sell it and then dump her. He had loved her for years but never dared to disturb her life. He bought the game she designed without knowing she was its creator. After an accidental fall into the water, the two of them somehow transmigrated into the game... She was the designer, and he was the buyer. In real life, they'd missed each other and had no connection at all, but in the game, they joined forces to level up and fight monsters.
Premise: Grow stronger with every battle