Fun is definitely something that is never on Akutagawa's mind. The only 'fun' he has is killing, and with his deal with Atsushi, at the moment, he doesn't even have that.

"I'm glad to hear it." His tone is dry; he doesn't actually care how she's doing, but he can be polite. He takes a sip of his hot cocoa, feeling his face grow flushed. Ah, so it's like this, is it?

"Of course, Diva-san."