Title

Looking for this one manga where heroine is considered "average" with a blacked haired mage that was considered unusual in that world. Then ML got adopted by another black haired mage.

I forgot how it started but I remember ML causing an accident because MC wanted to see more of what ML could do with magic, near a bench. The two got soon after engaged, bc, if i remember correctly MC got scarred (not a big one).

Tidbits of what I can remember:
- ML was part of the "heroes party" as the mage (an overpowered one), he defeated the demon king solo and left saving the princess to the prince.
- Big part of the plot is that, their marriage kept getting pushed back because ML is so busy. The king kept him busy.