Please help!!

Please help me find this BL manhwa title. I forgot most of the story because there were only a few chapters at the time. If I remember correctly, the story is about the MC going with his friends into the wilderness, and then they discover a mystical cave. The MC accidentally breaks a seal? Then a mystical being (the ML) is freed from a curse and starts bothering the MC. I forgot what happened to the friends—if I’m not mistaken, they disappeared? I’m not sure, but the MC keeps returning to that cave to meet the ML.