It's about a boy who really like playing Street Fighters. The heroine is his classmate, she's good at everything, and she beat him in the game. I remember that the time is year 1997, and maybe the name has the word 'girl'? The girl's family is rich, she has long black hair and rarely smile. When the girl had to go oversea, the boy gave her a ring, and she still keeps that ring until they meet again in high school.
There's a Bonus: https://imgur.com/gallery/ME3TCht