Konosuba - God's Blessing on This Wonderful World! Vol 20

From the Yen Press edition

Now that their wild escapades in Elroad have come to an end, Kazuma and the gang return safely to Belzerg. Kazuma figures that after celebrating their successes, he’ll be heading back to Axel… But when Iris says she wants to live together, how can he say no to that!?

Source: Yen Press