Haru was a background character in the comic book they're in, only people with their ego know they're in a comic book, if they dont have it they forget anything that happens in the shadow and can't feel the time skips, then Dan Oh came, trying to change her fate and named him Haru, he kept forgetting her until he got his ego, now the inseparable, then he lost his ego and disappeared and when he was back, he had a role as Baek Kyungs friend who follows him everywhere, then he got his ego back