[Serious is how ninja are supposed to be, inasmuch as Sasuke has bothered to remember much of the shinobi code. Itachi's second statement makes him blink, though, and then duck his head in a certain amount of embarrassment.]
It's not ... I usually prefer to focus on the tasks at hand, that's all.
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It's not ... I usually prefer to focus on the tasks at hand, that's all.