Nino's past is really sad. The fact that someone locked him up and that when he died he kept following him as a shadow is creepy. Also I think that this shadow put Nino seriously in danger for making Aiba speak with it. And Nino made the shadow disappear because he accepted his past and he could go on.
I think Nino it's an example that Sho and Ohno should follow because he is the proof that every wound with time can be healed, even thought some times it still hurts.
Liked this chapter and can't wait to read the next ^^

Bye <33