...I wouldn't marry him, honestly. He seems like the type to not come home much and leave a lot of lonely nights.
Since he can memorize formulas and shortened them, MC could probably use the teleportation spell he got caught in the past in that certain dungeon... (But there's no such thing IRL... )
Also I can't off the top of my head think of a wedding scene like this that felt blander or had less sentiment. He might be married, but there sure wasn't any romance. Honestly, given how weddings chapters are almost a free sentiment-fest—like they sure can could feel shallow, but normally there's at least feelings to feel shallow in the first place—it's almost kind of impressive.
Actually, I was expecting more from the proposal from a man, but since this has been quite a fast-paced comedic series, it was still within expectations (Raina doing it was cute but at the same time, makes me weirdly disappointed at the husband-to-be to not take it at his own hand to confess), and the MC has the hots for her since quite a long time anyway, but the overly stoicism of the MC can't even smile... Disappointingly.
Unfortunately, it seems like it has been years since they saw each other when Raina was first trained by MC's mother, which could've made the story longer but they ultimately skipped most in-between. Sigh.