You finished helping Venti rescue Dvalin from the hands of the Abyss. When you both went to give the Lyre back, well... It's kind of... broken. When Barbara saw the Lyre broken, she started praying for you and Venti.

B: Please, Barbatos, forgive these poor souls.

You were trying not to laugh, but you couldn't help yourself when Venti said:

V: I think he doesn't give a f#ck.