I heard there's going to be more side stories for this but for the side couple(s?) so that's why it says to be continued but the Hamin and Sehyuk-focused side stories are over therefore "The End." I'm not sure though
I'm pretty sure the side couple is Hamin's two friends cause I think it was pretty clear Changsuk (glasses guy) likes Young-eun (Hamin's friend that got kidnapped).
I heard there's going to be more side stories for this but for the side couple(s?) so that's why it says to be continued but the Hamin and Sehyuk-focused side stories are over therefore "The End." I'm not sure though