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 (Series) favorite_border

[DeepL Translation - needs review] Volume 1 Introduction: Yuki is reborn as a demon king in a different world and starts building the most comfortable and most dangerous dungeon with a super-convenient catalog shopping (?) service! He begins to build the most comfortable and most dangerous dungeon in the world! Just as he is about to start a new life, he suddenly encounters a super-strong character called "High Dragon" and dies instantly! But then...

(Translator: DeepL)