Elle's Naughty Threesome

A group of four friends, Mitsuki, Tatsuya, Ayaka and Kazuya, are spending their last summer together before they go off to college. One day, while exploring the mountains near their hometown, they stumble upon a mysterious cave which leads them to a strange world inhabited by monsters and demons. As they navigate through this new realm, they encounter a powerful sorcerer who reveals that they have been chosen as the champions of light to defeat the evil forces threatening the land. With their newfound powers, the group sets out on an epic adventure filled with danger, excitement, and romance.