I'm... I'm so happy for him/them. But mostly for Master, he successfully proposed (well, not what he had in mind) AND made her realize her feelings! Hopefully, mom isn't against it.
And I'm so excited to the reaction of his friend!
Hopefully, we at least get to see a lil' bit of their married life (naturally, I'd want to see the kids but knowing the bocchan, despite the fast pace of this surprisingly sol manga, I don't think he's particularly ready for the lewd for married people. But Ganbare on the name calling at least)