Mahito deftly uses Yoshino's admiration toward him to make him fight Itadori. Yoshino races toward vengeance and Itadori exchanges blows with him to try and make him explain his motive, which leads to him learning the cruel truth from Yoshino's lips. That's when Mahito creeps up beside them and--
There's something I have to go back and do.
.هناك شيء عليّ العودة للقيام به
Ich muss zurück und was erledigen.
Tengo que ir a encargarme de algo.
Tengo que ir a encargarme de algo.
Il me reste quelque chose à finir.
Devo tornare indietro a fare una cosa.
Eu preciso voltar e fazer algo.
А у меня ещё остались
кое-какие дела.