Kang Y/n is a cheerful girl who hids her secretive past from everyone including her best friend, Jieun. She is very excited for her first day of High School and has everything planned. No more bullies to interfere. Focus best on studies. Decide her career and of course- find the 'one'.

But there is a little change of plans. She was to study with the person from her past whom she hated a lot is here. Can she survive her high school years while avoiding her person from the past? Or this will cause more tangles in her already tangled life?