downside of having a group of actually mentally unwell characters in anything is that people will see how popular they are and do anything to prove that their favorite group of happy golden retrievers is just as unwell because "they can't be worse"
Tsukasa never was and never will be like mafuyu. is he completely fine and stable? probably no because of saki's condition but he would never go to miku and say he wants to disappear because you know what he has???? coping mechanism. unlike mafuyu