You Promised to Save the World, but Why Did You Fall in Love?

Lin Hechuan's biggest secrets are two: One is that there is a two-meter-tall old man in his head, forcing him to fix world bugs. The second is that the bug is his childhood sweetheart, Su Wankui, who he has had a crush on for three years. "I don't play FGO either. Someone asked me to fix the 'singularity'." This is a story about a big boy who likes to listen to "Good Luck" and is urged by a two-meter-tall old Mamba man with muscles like durians in his mind to save the world and talk about love at the same time.