Souma is really susceptible to cracking up, and even memories will put him into laughing fits. But being self-conscious about this, he always tries to hide it. When he does this again at a clothing store his friend works at, the friend asks him why he does that, especially when it's so easy to tell anyway. Later, Shun also repeats the same sentiment...
Yeah, no, it's super obvious that you still do.
لا، على العكس، من الواضح أنّك تفعل ذلك
Nur, dass trotzdem alle sehen,
dass du lachst.
No, en serio, todos lo notamos.
No, a ver, que nos damos cuenta todos.
On te voit rire quand même.
No, si capisce comunque che stai ridendo.
Nah, dá pra ver que você ri.
У тебя плоховато получается.