She's my Younger Sister, but it's okay Manhwa also known as (AKA) "SISTER". This OnGoing webtoon was released on 2020. The story was written by N/A and illustrations by N/A. She's my Younger Sister, but it's okay webtoon is about Drama, Romance story. She's my Younger Sister, but it's okay Manhwa - Summary “Jiyeon, why are you at my house…? What is this when you return home after being discharged from the army? An eleven-year-old sister lives in without a word. The cohabitation started without a warning was caused by a little sister like a beagle. It’s just getting dizzy, and to make matters worse, I enrolled in a university and stayed there all day, 24 hours a day…