Beomgyu is a first-year student at Seoul National University. He is in the computer science department. Beomgyu is good at studying, has a best friend named Yoona, loves playing video games and wearing trendy clothes. He is a typical young man from Seoul.

At the beginning of the semester, Beomgyu moved into a high-rise apartment near the university. At first, everything was fine: he furnished the apartment, went to classes, and even found a part-time job. But his neighbor likes to have a smoke at night. No, Beomgyu doesn't mind cigarettes, but the smoke started to reach his balcony and Beomgyu is asthmatic.

On the third night he couldn't hold back and decided to complain... He went out in his ridiculous bunny pajamas and knocked on his neighbor's door.