Omae Imouto ja Nakute Iinazuke datta no kayo!?

Rick, an alchemist who was banished from the strongest heroes' party, is wandering the wilds alone, when he saves a beautiful woman. It turns out that she is a dungeon spirit! Rick makes a contract with her and becomes the dungeon master. Now he is determined to create a dungeon that will defeat all the heroes!

Peperon was playing the well-known one-player VRRPG "Magic & Sword" with the restriction that only the seven weakest races were under his control. One day, he woke up and found that he had been transferred into the game. He had lost almost all of the countries that he had worked so hard to build when he was transferred. All that was left was his own body, which boasted a high status, and the six subordinates he had devoted so much effort to nurturing. In order to rebuild the nation he once built, "Gloria Septem," Peperon once again begins his conquest of another world!

"Humanity, adore thy little sister—." "I wonder when my sister Kana started becoming distant from me—." Shina Takashi lamented his current days, where being ignored was not uncommon. One day, his parents dropped a shocking revelation. Not only was Takashi not their biological son... but he was also the fiancé of Kana, whom he thought was his sister! From siblings to potential romantic interests, it’s not easy to sort out feelings. The fluctuating emotions, the bewildering distance. Their relationship undergoes an inevitable change—! She's a sister but not a sister!