>>280654020
>Yura: We are about to gamble our lives after this.
>Yura: And before that, I really
>Yura: want to go take care of business.
用を足す means to take care of business... or go take a piss and/or have a shit. Yura is talking about going to the loo. lol
>Old Sir-kun: If you search, you can find the washroom on your own....
>Old Sir-kun: ...Do as you please.
>Old Sir-kun: Tails.