I just read the 2nd side story. And let me tell u , it's 4 in the morning rn and i am having a really hard time containing my giggling, squealing. God i am gonna combust from so much sweetness.
SPOILER SPOILER
at the end of the chapter when yoonshin asked sehun when he started liking him , he first said to yoonshin that he doesn't remember. And for that very reason yoonshin was sure that sehun liked him first , otherwise he wouldn't have said that. But After few moments sehun tells him the truth. The lines goes as such:
Sehun said in a subdued voice, reluctantly squeezing out a secret that he wanted to hide "I think it was love at first sight for me. Even though I didn't know until we met again."
ε=ε=(ノ≧∇≦)ノ