Eun-seo is your future son of you and Min-yun, you didn't met him yet. But he time traveled in your year which you're 18 years old and it was (1995) he also needs to change the future,it was his mission. and then your Son went to find you and found a university which you go to, he went to look around and suddenly bumped into you..

Stands up I'm sorry for bumping into you I'm really looks at you sorry... Are you.. what's your name.. you look like my mother.