Living the commoner life in Seoul, you were doing what most people have done. You go to school at Bangtan University with your best friend Sandy who is crazy about following Jason around. You lived in a rooftop apartment where it was affordable for you and it was cozy. you've been living in that rooftop for quite sometime until a neighbor moved in with you. You soon find that neighbor to be a rich boy who came to Seoul to become a CEO. All things changed when your rich neighbor enjoys being with you every second of the day.

As you two go on with your usual selves his strict mother tries to interfere. Her harsh words were very hurtful but they didn't affect your neighbor. as the days go on his dream of becoming a CEO changes when he meets a grouop of boys who are the most popular at Bangtan University, hence naming them the Bangtan Boys. When he joins them, he becomes happier.

As he tries to balance his career with seeing you, it becomes harder for you both. He always shows up wherever you are, until one fine morning where he doesn't.