[ Remember only that you brought this upon yourself.

Naoto is thoroughly enjoying exploring Sion's entire torso with his mouth and tongue and teeth, sometimes trying all three on the same spot (one after the other with a half-moment's pause between them), while he gets his hand all the way up Sion's spine then decides to

very

delicately

drag his fingernails down it— barely touching, but certainly enough to be felt! ]