True there's not much hint but at least if I remember correctly Nari had been on a phone call with Da Hee with her telling Nari she was meeting JungAh or something, that flashback scene must have happened then. Of course, unless you reread, there's no way you would've known the significance, I suppose.Idk man, I love this plot but with how the story telling goes, this feel too much of a convenient plot. There wasn't any hint and just a big surprise at the last moment.
Don't get me wrong, I don't hate it but I also have a mixed feeling
There's also the swap, everyone else even Chuuni has been shown being friends with Ingong except for Jung Ah, her appearance at the beginning is just her usual greetings with Nang Lim, then in the field trip her interactions is just with the girlsTrue there's not much hint but at least if I remember correctly Nari had been on a phone call with Da Hee with her telling Nari she was meeting JungAh or something, that flashback scene must have happened then. Of course, unless you reread, there's no way you would've known the significance, I suppose.
Edit: Ah found it, it's on chapter 155