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...
And I haven't laughed since.
ومنذ ذلك الحين، لا أضحك إطلاقاً
Und seitdem lache ich auch nicht mehr.
y desde entonces no me río.
y desde entonces no me río.
e da quel giorno non ho più riso.
Desde então, não rio de nada.
С тех пор совсем не смеюсь.