I was completely expecting BL but this is not it!! Yoseob is a victim of domestic abuse and saw his parents commit suicide when he was young, hence is not mentally stable. His step brother Jaeha taught him the emotion 'like'. However, Yoseob is obsessed with Jaeha and accidentally killed him in an accident.
This story is so freaking dark and sad, the ending made me cry so much. But the plot is 10/10. I feel so bad for Yoseob I wish he could recover and live happily with his brother.
Ps: read the author's note at the end for the title explanation, its quite interesting.
An Uncomfortable Truth