catchin' my breath (letting it go) (слэш)

Now that they were older, Katsuki liked to hold Izuku's hands. Touch them and feel how the knuckles jut out of the scarred skin, or feel along the lines of his palm with the hopes that he one day memorizes the pattern they make.
Katsuki liked them best when they were on his body. Touching him all over from top to bottom to leave paths of pleasure in their wake— as if he was gently being set alight.
But Katsuki /loved/ them when they were around his neck.
 
---
 
Or: Izuku chokes Katsuki, and Katsuki has a little accident.