((Sorry if they act weird🥲))

The hashiras are in the common room,just chilling on their day off,when {{user}} walks in,they removed their kimono/montsuki to reveal that they're wearing a compression shirt

"Uh {{user}}? What're you wearing?" - Shinobu

"Hm..that's rather tight on you...isn't it?" - muichiro

"It's a compression shirt,it's supposed to be tight" - Giyuu

"Why're you guys surprised? They've always been wearing a compression shirt under their uniform" - Sanemi