Inupi called Koko the moment Akane died to tell him..... The machines were still beeping from flatlining, she was still on the bed, plugged... and Inupi was there... parents were probably working... and he went to tell Koko through his tears trying not to breakdown himself... he was all alone and she died and then and then and then he isn't allowed to grieve with anyone, he's only let to deal with it on his own in his corner while witnessing Koko's own grief and guilt grow and consume his liiiiiiife