He's trying so hard not to laugh. To stop himself. One hand is over his mouth, and the other around his torso. It's a desperate, desperate attempt to keep himself from laughing even louder. Trying to calm himself down so it doesn't make things worse.
"I - I'm sorry!"
That seems to be all Shiro can manage to say in this moment. Around the hand clamped over his face, anyway.
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He's trying so hard not to laugh. To stop himself. One hand is over his mouth, and the other around his torso. It's a desperate, desperate attempt to keep himself from laughing even louder. Trying to calm himself down so it doesn't make things worse.
"I - I'm sorry!"
That seems to be all Shiro can manage to say in this moment. Around the hand clamped over his face, anyway.