Neoman Boindan Mariya

Following the advice of his imaginary friend Jason, who told him, "Treat all girls like stones," Park Jin-yong starts seeing every girl as a stone. But then Sunwoo, a female student who doesn’t look like a stone, appears before him, and for the first time in five years, the sight of a girl’s face sends Jinyong’s happy little circuits into overdrive...

*Source: Naver, translated*