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

Read Manga Now I’m a Demon Lord! Happily Ever After with Monster Girls in My Dungeon / 魔王になったので、ダンジョン造って人外娘とほのぼのする / 마왕이 됐으므로 던전을 만들고 인외아가씨와 훈훈해진다 / 魔王建造地下城转生到异世界建造人外娘 / 魔王建造地下城轉生到異世界建造人外娘 / Я стал Повелителем Демонов и создал подземелье, чтобы проводить время с девушками-монстрами / Sau Khi Tôi Là 1 Ma Vương, Tôi Sẽ Xây Dựng Hầm Ngục Cùng Với Các Nô Lệ! / Acum Sunt Un Demon Lord! Fericit Până La Adânci Bătrâneți Alături De Fete Monstruoase În Temnița Mea / I Became the Demon Lord so I Created a Dungeon and Spend Heartwarming Time There with Non-Human Girls

Before I realized, I had become the guardian of a dungeon, a Demon Lord. I was suddenly in a dangerous world with giant monsters loitering around, fighting for their existence. So I thought to go about developing the dungeon in order to not die, but for some reason I was having quite the good time… How did it turn out like this?

The protagonist, Yuki, having to live in that world now, uses his bold and sharp senses and spends time with a supreme dragon girl and a vampire girl, sometimes laughing, sometimes being angry, passing days doing what he likes.