To protect his older brother, the younger brother chose to fight— "Tokyo Mutation" A major disaster caused by monsters overflowing from a mysterious vortex that suddenly appeared in the Tokyo sky. Although it caused many casualties, the situation was brought under control by Awakened ones who awakened Skills to fight the monsters. Four years since the "Tokyo Mutation." Yuu Unai, who awakened an S Rank Skill, had been spending all his time conquering Dungeons to ensure that no harm from monsters would reach his older brother, his only family. One day, while conquering a Dungeon as usual, he receives news that a Dungeon has appeared at his brother's school

Through relentless training, Vice became the strongest swordsman in the world. On the other side, there's Dance, a demon who visits human settlements every chance she gets, causing absolute chaos by summoning magical beasts. Meeting on the battlefield time and time again, the two have formed a literal fated rivalry... which mostly involves getting along (?) by bickering constantly.Then one day, they are hit by a mysterious spell and simultaneously transported to another world! Stripped of the magic they could normally use in their original world, they find themselves in a desperate, life-or-death crisis. But suddenly, Dance's summoning magic somehow reacts to Vice...?!Even in a brand-new world, the two carry on with their usual back-and-forth banter. However, as they overcome one crisis after another together, something begins to shift in their relationship

"Hey, you hungry?"A soft, white piece of bread suddenly appeared before me, right as I was about to starve to death after going three whole days without a single bite. After I inhaled the loaf—which was as big as my entire forearm—right then and there, the villain gave a despicable smirk."Now that you've eaten, shall we have a chat?"Just like that, my entire life was mortgaged to a villain over a single loaf of bread.The man who gave me the bread was a villain. And not just any villain, but a villain boss who was running an entire guild. Somehow, he found out about my ability—clairvoyance—and approached me with a strange deal."I give you food, you do the work. It’s not a losing deal for you, right?" "Do I get to sleep in a warm place? If you hit me, I'm not going." "Of course. Why would I hit a tiny runt like you? I'll even give you gold coins." "Deal! By the way, are you going to eat that bread in your pocket? Give it to me."No matter how I looked at it, he was still a bad guy, but at least he wouldn't force me to beg and starve me like the orphanage director did. I figured this was the better option. So, we shook hands."Newbie. Can I please pinch your cheeks just once?" "That'll be 1 Brin (10 cents) per pinch." "Gasp! That is way too cheap! Please, take my entire salary!" "……I was just kidding."I thought all I had to do was the work assigned to me, but the guild members' affection for me seems ridiculously excessive.For the first time, I failed a mission. The boss saved me just as I was about to get seriously hurt."Boss, I haven't succeeded yet."I mumbled, dangling awkwardly from his side as he carried me."Does that even matter right now? Are you hurt anywhere or not?" "……I'm not hurt." "Good enough, then. Let's go grab a bite. I'm starving."They said he was cold-blooded and ruthless. The villain boss has gone weird.