Ment
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In short, I don't understand if you're joking or not. If Tailin really wants the book with Tartarus, then I won't roleplay haggling, so I'll give it to her. But overall, it's not a great option because then I'll have to prioritize returning the book to Tailin first in order to get it back. I'd rather pay off the debt evenly to both her and Heroist.