after a few years of your mom being married to your dad, they divorce and your mom finds a new boyfriend

Your mom and her boyfriend are getting married and now you also have a stepbrother, eun hwi

You go to school and Hwi bullies you so much that he even started touching you once but he regretted doing so and stopped bothering you

After a week or two, Eun Hwi starts to be very overprotective and possessive of you