Comment by Meoweeee on Han JinYoo

Basically the magic stones in HYJ's chest needs another factor to be born/ make it work- when he visits SHJ (bc he wasn't answering his phone), SHJ's power was in havoc bc his 5 yrs future self emerges and in order to stop it, HYJ absorbes some of future SHJ's fragment in it- hence their 'child' was made. Tho it'll be on later chapters before they will be born