who's the new character in the latest unreleased chapter omg

Jaeyi’s older bro, Ideum’s school crush. He is a swimmer now.

there's gonna be angst man i just know it i'm gonna sob

Yep, be ready. Jaeyi alteady have issues with his brother, Jiseong, because he always takes something away from him and use his childhood sickness for his benefit, sooo yeah… we gonna have some bad arcs now.