WAIT WHAT HOW?
Oh its little sister?? I thought it was a boy
It's actually in an AU short side story that takes place in an Omegaverse I think?(￣∇￣") Based on the comments that were auto google translated that's seems to be what the side story is so in short it has no connection with the main story line of episodes.(▰˘◡˘▰)
But yes it's really cute I kind of wish the author would allow the two to adopt a child later on because Yul being a big brother was sooo cute!(❁˶⌒∀⌒)♡
ch?
There’s going to be an extra story where they end up getting pregnant and give Yul a little sister. It’s the cutest little thinggggg