The Mysterious Class (2021)

This series is inspired by the old movie "Whispering Corridors"

Source: Soompi
https://www.soompi.com/article/1497245wpp/watch-treasure-drops-spooky-teaser-for-horror-web-drama-thats-a-male-version-of-hit-film-series-whispering-corridors

Both mini dramas/series have the idol group TREASURE as the actors. In both of these you can see the friendship and relationship between the members and how much they care or one another. Not only are the actors cute, but the storyline in both are really interesting. Both are super small things to watch, but they're well worth it!

Treasure's second drama. It is about a group of high school students who find out that one of their classmates is a ghost. Follow the boys as they try to figure out who the ghost is!