Maou ni Natta node, Dungeon Tsukutte Jingai Musume to Honobono suru

One day, I found myself transformed into a Demon Lord tasked with protecting a mysterious dungeon. Thrust into a perilous realm teeming with colossal beasts locked in endless battles for survival, my immediate goal was simple—strengthen the dungeon or perish. Yet, against all odds, I began enjoying this unexpected role. How did things take such a strange turn? Now, the protagonist, Yuki, must navigate this chaotic world with his quick wit and fearless instincts. Alongside a majestic dragon girl and a charming vampire, he shares moments of joy, frustration, and everything in between, crafting a life on his own terms. Each day brings new challenges, but also unexpected warmth and companionship. Despite the dangers lurking around every corner, Yuki discovers that even in this harsh reality, there’s room for laughter and connection. The dungeon, once a symbol of survival, becomes a home filled with bonds he never imagined forming. Through battles and quiet moments alike, Yuki learns that strength isn’t just about power—it’s about the people who stand beside you.