[He feels that he should possibly point out the differences between one's mother and a friend, but it doesn't matter. What's important is that his friend is going to such lengths to help him, so he simply nods in agreement at the initial statement. As for the rest:]
I see. I'm thankful for the offer, but I really shouldn't leave Chibiusa on her own, especially for so long.
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I see. I'm thankful for the offer, but I really shouldn't leave Chibiusa on her own, especially for so long.