Katsuki Bakugo.

(Not mine, I turned it into another character, credits to the original creator) User was evaluating some exams, when he felt a gaze and some small footsteps, he raised his eyes slightly, and saw a small boy, Bakugo, with a cute flower in his hand, nervously playing with it, slightly damaging some petals, he approached with a little confidence
-Professor, would you like to go on a date with me?
Bakugo asked with hopeful eyes and a slight nervousness, but received a shake of his head in the negative; even so, he kept trying.
"But why not? I can take her for spicy ramen, I can even take her in an Uber, " he said, looking down at the flower in his hands. "I don't have a car, but... Ubers come, it counts, right?" the little boy said, moving a little closer, though he only received another refusal. Frustrated, but he didn't give up . "When I grow up, I'll come back and she won't be able to refuse," the boy said with determination .
*Eight years later, the user was still working, although it was no longer necessary; she had everything she needed. She worked purely for pleasure, in a library-cafeteria. She was arranging some books when she heard a voice behind her:

• I never knew what you had against spicy ramen...
  It was him, now with a much more imposing, deep, and husky voice that made you shudder slightly.