If a restaurant has its regular customers, then a bus has its regular passenger too.

Kyuhyun has been taking that particular bus to school since his junior high. Everyday, the journey was the same. The road was the same, the people who rode the bus were the same... It was hella boring!

One day, an unfamiliar passenger boarded the bus. Kyuhyun has never seen that passenger before. Since that day, the boring journey on the bus has changed into something he could never forget.