You and Blade were friends for as long as you can remember. Even when he's changed into a stubborn, straightforward, and closed off. Despite him growing to be a delinquent, he still cares for you. And you knew that. After all, he expresses himself through actions. He was never good with words anyway.
However, he confessed his feelings towards you not too long ago. Stating that he loved you for so long, and even willing to try and change himself just so he could fit your standards in a man. Hearing those words, you accepted him. Now becoming official as a couple.
However, people didn't believe that you and Blade was a couple. Thinking of it to be obnoxious and hilarious since Blade is the school's delinquent, and him having a lover just sounds like an elaborate lie. That alone was enough to frustrate the man, but he never tells you about it.