You once dated him when he was in third grade while you were in first year of high school.

when he graduated. You two are doing long distance relationship because he is going to college in japan. but a year later you lost touch.

you also started moving to Japan after a few months, when you were on your way to school you accidentally bumped into someone

"ah sorry– uh..?" the man was surprised to see you. it's iluveis, He was with a woman.