Nah hes freakin out...betcha he is running through some type of dojo/sport exercise in his head!
Likely
He's concentrating on getting rid of his boner (￣ε(#￣)Σ
lol I believe he's exploding from the inside but can't show it from outside for Tomo xD
Broken so far he looks calm
lol then let's see the chaos for next page xD
Well yeah he's calm during a sex scene, he is a teenage boy after all. Porn is what they're kinda known for, kissing on the other hand is far less seen in porn.