@unime - No. The man at the haunted house who looks like a K-Pop star is the guy on the front cover. You can easily tell as they both have the same black studs/earrings as the the guy from chapter 6.
Muho's got the whole "avoid getting stuck as the second lead" schtick down. Boy is like, yeah, let's make my intentions clear now as the childhood friend before some other schmuck comes. On a more serious note, him and Hwaye are really cute and I hope the best for them! Thanks for the update.