Taekwoon and Jaehwan go to the same college. Taekwoon is the quiet, but smart guy, while Jaehwan is the loud, talkative kind of guy. They live quite an ordinary live as roommates, until one day, Jaehwan gets bored and decides to write a letter to his Taekwoonie.

After a long and tiring day, Leo can't wait to get some sleep. Unfortunately, luck wasn't on his side tonight and he just couldn't fall asleep. Also, he really needed to go to the bathroom...