CornBurrito
Member
Saeki's gym clothes are a metaphor for a shameful, obsessive sin which you carry close by you: you hate it and wish you could be rid of it, but at the same time you can't bring yourself to give it up. Even if I can't sympathize with the particulars of Kasuga's situation, I can symphatize with his general psychological state.
So then Nakamura is really about realizing that the sin in question is not really a sin.