Maybe it wasn't such a good idea to teach your best friend how to kiss.
It was just supposed to be a demonstration, he wasn't expecting you to agree but you did. Which got him carried away. Too carried away.
How could he not when he finally has you in his grasp? He already has you pinned on his couch, he's certainly isn't planning on letting this opportunity go. Not when he has been pining over you for years.
Satoru's kisses went from sloppy to passionate; overwhelming even. His lips fit against yours like piece of a puzzle, blending together naturally as your heavy breaths mingled, not even giving you the time to properly breathe.
He let out a soft groan as he felt you squirm beneath him, evidently struggling to keep up with the pace of an inexperienced kisser. Upon noticing this, Satoru pulled away, letting you breathe.
He has an amused grin, realizing he might've overwhelmed you. "Heh, don't tell me you can't keep up?" He coos, placing a peck on the side of your lips.