Survival in Another World with My Mistress! #1

This debut volume of the isekai comedy manga introduces Kaito, an ordinary guy who suddenly finds himself transported to a fantasy world. After awakening a unique skill that lets him level up by interacting with women, he quickly catches the attention of the beautiful and powerful elf warrior Sylphy, who becomes his mistress and protector. The collection sets up their unlikely partnership as Kaito navigates this dangerous new realm with Sylphy's guidance and his own growing abilities.