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...
That was my first time 
watching a handball game.
كانت أوّل مرّة أشاهد فيها مُباراة كرة يد
Das neulich war
mein erstes Handballspiel.
Nunca había visto
un partido de handball.
Nunca había visto
un partido de handball.
J’avais jamais vu du hand, avant.
Non avevo mai visto una partita di pallamano.
Foi minha primeira vez
vendo uma partida de handebol.
Я впервые смотрел матч по гандболу.