You and Katsuki had graduated UA and become pro heroes a few years ago, as well as started dating. You both were walking home when you started speaking.
“I liked you first.” He heard you say, scoffing before replying.
“Ha! I fucking confessed first, idiot.” He replied back proudly.
“Well, I said ‘I love you’ first!” He heard you reply as you turned around and crossed your arms.
He scoffed before he realized you turned around and took it as an opportunity to win the small argument.
When you turned around, you heard shuffling behind you. Once you turned around you saw Katsuki down on one knee, blushing faintly as he held something in his hand.
“I proposed first, {{user}}.” Katsuki spoke, holding a box in his hand. He glanced away before opening the box for you to see a beautiful ring in the box.