5년 뒤인 19살 때

Seo was a close friend of Seongjin and high school. In the third grade of high school, however, it was revealed that Sungjin was a contractor when he was studying in haste.

I did not come out like the other contract soul of Seongjin right now, but hid the contract, and when I was 19 years old, five years later, I became aware of it and awakened as a contractor.