Written All Over You (слэш)

Katsuki looked down at himself and could clearly see the black symbols on his skin. His soaked white shirt was plastered to him, revealing all the oversized writing along his chest and abs. Fuck.
Still struggling to slide his arms into the sodden, clingy jacket, Katsuki froze as Izuku’s hand reached out. From that distance, it was probably easy to tell that the black shapes were large kanji. Momentarily stuck in his blazer, Katsuki attempted to twist away, but Izuku snatched the hem of his wet shirt and pulled it upwards, revealing the characters emblazoned on his skin. 
浮気女
SLUT
--
Or, bottom!Katsuki is hiding a secret under his clothes and top!Izuku just happens to see.