All i can remember from the manwha is a specific chapter

Uke/main character i think has been having nightmares or not really sleeping or some other issues. Possibly his brother or someone he is very close too and living with the uke and is worried for him.

And there is a video tape from the the twos past or an event they know off both end up watching the tape to figure somethings out video tape from their past there was a fire and i think it was them as a child being rescued. There was there a child(maybe main or seme) and may have ran off screen. And a third person involved in with white/lighter hair. That both brothers know, but either vanish or presumed to be dead.

Seme may have burns on arm/hands maybe (sorry i really can't remember)