Childhood companions Namju and Yeoju find themselves trapped in a dungeon, where their only means of escape is to lose their virginity to one another. Initially, they are reluctant, but soon they end up summoning a tentacle monster to assist in getting things underway. And indeed, they do get started when Namju notices something wriggling in Yeoju's pants, prompting her to exclaim, "You got a tentacle too?!"
LewdManhwa
