Kaku x trauma

Story: kaku kept having nightmares every night because of his past and he kept waking up screaming and it's only you two in the house because the others went on a mission what he did in the past: he killed both his parents and he didn't mean too, now he has nightmares of it every night as in the dreams he can't even see his own parent's faces at all..every dream he sees his parents...but their faces are blurred out...hes covered in THEIR blood...while everything around him is dark..he wakes up screaming every night..like what he did is haunting him..