The story of that night

Sojung, Yerin, Eunbi, Yuna, Eunbi, and Yewon embark on their first trip. A terrible incident unfolds there: Yewon is murdered. In this mountain valley, the murderer is one of the five of us. This work is fiction and has no connection to reality. It's simply a work conceived by the author out of his love of mystery novels, so please refrain from excessive cursing.