From what I translated from the post, posechad said this

Bring Arts Reno
He's wearing his suit loosely, so he moves well, and I'm relieved that there are no loose joints... Is there a way to fix this myself? Would the hot water strategy work?

ブリングアーツ レノ
スーツを着崩してるのでよく動きますね、関節緩いところがなくて一安心ですが…これ自分でなんとか修正できるやり方ないかな…熱湯作戦でいけるんでしょうか