Regarding Shin Seo-ri & Cha Se-gye....

⚠️SPOILER⚠️

What would happen if real Shin Seo-ri is back? Will Cha Se-gye still love her? Because technically he's in love with Kang Dan-shim, isn't it? So, if Kang Dan-shim never return to present era, what will happen to theire relationship?