Yuilhan, Naui

Ten years ago, on an unusually cold winter day, Do-Eon's father brought home a boy. The boy, named 'Mi-I', became Do-Eon's younger brother, and the 18-year-old Do-Eon began to embrace his not-blood-related younger brother out of simple pity, becoming Mi-I's sole guardian. Mi-I grew up with the comfortable fence of Do-Eon as a shield. Seven years later, Mi-I pushed his father down the stairs due to a certain incident...

"...You know. Actually, I did something terribly wrong to my brother. I'll tell you everything later, so please don't hate me too much after hearing it... Okay?"

(Source: Bomtoon, translated)