Twenty years before the final Douluo battle, the Spirit Hall had conspired to unify the entire spirit master world and annex all the sects. The Seven Treasures Glazed Tile Sect was the first to be hit and fell into danger. Bone Douluo brought the sect's young master, the five-year-old Ning Rongrong, to ask Sword Douluo to rescue them. So Sword Douluo Chenxin took little Rongrong on a life-and-death escape. However, what they didn't know was that behind this road was a huge conspiracy that would affect Douluo Continent...

Tanya Degurechaff is a soldier who has the appearance of an innocent young girl. But behind her cute facade lies the soul of a ruthless salaryman who challenged "Being X"—the self-proclaimed God who reincarnated the man into an industrial world of magic. By doing this, Being X hopes to prove that, if the situation were dire enough, even a non-believer like this man would pray for God's help. Opposing Being X's desires to make her suffer, Tanya enlists in the military with the hope of living a peaceful life. She manages to impress the higher-ups with her aptitude for war, swiftly rising through the ranks. However, her country soon participates in the ongoing world war, quickly crushing her dream. In an attempt to return to her calm she starts using any merciless means to obliterate her opponents. Thus begins the saga of Tanya the Evil and the Empire as they seek world domination.

High school student Haruka has always been a content loner. One day, he and his class are abruptly transported to another world and given skill points to use when choosing from an assortment of abilities and magical powers. Unfortunately, Haruka arrives last, and he can only use his points on the seemingly impractical abilities the others had no interest in. Although he is on his own again and must adjust to his new life by himself, he much prefers it that way. However, Haruka's peaceful solitude is short-lived, as he runs into some of his classmates. Weak to their pleas for help, he ends up sheltering and helping them reunite with the others. But the different cliques struggle to see eye to eye, forcing Haruka to find a way to end the infighting and restore harmony between them to survive the unfamiliar world.

Aired with the rebroadcast of Isekai Cheat Magician. Ordinary high school students Taichi Nishimura and Rin Azuma are walking to school one morning when they are suddenly transported to a magical world.