Description:

One day, I woke up only find out that I’d become a Demon Lord, an individual responsible for protecting a dungeon. The world I’d been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with each other each and every day for the right to survive. I had no choice but to strengthen my dungeon’s defenses in hopes of living another day—or at least that was what I’d thought. For some odd reason, I instead ended up spending my days in relaxation and bliss. This is Yuki’s story, my story. It tells the tale of how I spent my days after settling down in a dungeon with a self indulgent, “supreme” dragon girl and a young vampire. (Source: NU)

Description:

God left a dungeon in the hands of a boy known as the Demon Lord. After receiving multiple blessings from God, let’s start my life as a Demon Lord! …Or that’s how it was suppose to be, but God messed up and created the worlds' weakest Demon Lord ever. To continue living, I have to continue making dungeons. This story is about an idiotic protagonist, a lonely demons' child, an Undine who lives in a bathtub, and a princess who fell in love with the Demon Lord, even though she was human. A story that all unfolded during a bath.

Description:

"Come on, kill all those bandits for me already!" "No thanks. I don't wanna do any work." My name is Keima Masuda, and my hobby is spending each day doing exactly nothing... but one fateful night, I was summoned to another world where I met a blonde young girl who I named Rokuko. It seemed that fortune had favored me and I would soon be living a wonderful life free of work. But even though I'm a guy who loves sleeping more than eating, Rokuko demanded that I help her. "Save my dungeon! By the way, since you're the Dungeon Master, you'll die too if the Dungeon Core is destroyed." The dungeon only had one room, and it was already surrounded by bandits. Seriously? It's a checkmate already. I've gotta break out of this impossible situation so I can stop working and just sleep! (Source: J-Novel Club)

Description:

One day in a sunny leisure day, a woman visited my house and asked me if I’m interested in managing a dungeon along with support from a goddess. But of course, I refused. Eh? I shouldn’t ignore a person in trouble, moreover if it’s a beautiful woman? No way, that’s too bothersome and why do I have to do that? I’m perfectly satisfied with my comfortable life now, throwing it away is just overly stupid... Sigh, fine. So I just go to another world, become a dungeon master, manage a dungeon, and deal with a mana circulation problem? Understood, but how to do it? Let me show you how...