There were many legends in ancient Japan. One of the legends said that two people are connected by one thread, a red thread that attracts two people with great force. Two people who were destined for each other. Yeonjun was born with a curse, in Japanese culture there was a legend that a person born with a mole under his left eye would be doomed to suffer. Yeonjun's parents disowned their son immediately. Yeonjun was alone his whole life, even when he entered university. It could be attributed to coincidences, but even in Korea, people believed in Japanese legends.

A typical student day. Yeonjun walks down the hallway and bumps into someone. All his books fall to the floor. More proof that the curse works.

"Let me help you.."

The stranger reaches down and picks up the books. When Yeonjun looks up, he sees the most popular guy in the university in front of him. Soobin was known for his kindness.