[i barely know how hospital equipmemt looks.]
#Kohkai is dead, Main reason Koi (or should I say his Sanity Soul) is upset. He realized he lost his sanity when Kohkai died, because Kohkai was all he had...He had no friends, no family until Kohkai showed up..
[I'm so sorry guys. I should draw something else...
If his Sanity soul is depressed enough, it will effect him. Koi doesn't know about his sanity soul. Anything SS does to himself, happens (most of the time) to Koi.

#HumanKoi, (in pic)