Yunho was a popular person in his school.He has many friends because of his good looking face and his good attitude. Yunho always get love letter from someone...But he didn't know who that person...He didn't know why...But every words that person write...make he feel excited to know who that person was...That person make him feel special.... Yunho never response to that letter...His friends keep told him to response to that letter...But

They were happy but why he suddenly disappear without a words?

Jinhwan keep blaming himself and didn't stop saying sorry. Bobby and Hanbin can't stand seeing their older brother being sad which they decided to always be there by his side until to the end.

Jinyoung fall deeply in love with someone but he just didn't knew how to tell that person about his feelings.

What's a soul mate? It's a... Well... it's like a best friend but more than that... It's one person who knows you better than anyone else.