Ryouta Satou, who died from overworking at a black company, was reincarnated to another world. Although Ryouta was alive, he was now burdened with the inconvenience that his level is fixed to 1 in this new world. Although he wasn’t able to raise his level, he had a unique skill that can create a cheat-like item that shouldn't exist in the world from monsters. Knowing this, he maxed out his stats with the help of ability-up items, and he gathered a number of weapons and items that can only be used by himself, which made him have the strongest stats and gear despite being level 1.

This ambitious series will focus on Miyamoto Musashi, who is modeled after Toshiro Mifune, the Japanese film icon known around the globe. This is the beginning of an intense series full of realistic action in which Musashi's blade slices through evil as he traverses a land plagued by poverty.

Hasukawa Kazuya is in a terrible bind. His brother's new wife is also the woman that Kazuya secretly loves. Determined to avoid them both, Kazuya leaves home to live in the student dorm called Greenwood. There, he hopes to find peace of mind. Unfortunately for Kazuya, stability and peace are the last things one might find at Greenwood - home of the weirdest characters on campus.

After their world was saved by Gridman and Akane Shinjo returned to the real world, Yūta, Rikka, and Utsumi return to their normal lives, though Yūta still has to adjust to losing two months of his memories due to being possessed by Gridman during that time. Rikka and Utsumi work on writing a script for a play their class will perform in the upcoming school festival based on their experiences with Gridman, while Yūta tries to work up the courage to confess his feelings to Rikka. However, their life is disrupted when a kaiju suddenly attacks the city. Yūta voluntarily fuses with Gridman again to fight the kaiju, and is assisted by the return of the Neon Genesis Junior High Students, who now count a newly revived Gauma who commands DynaRex as their newest member. Gridman and the NGJHS defeat the kaiju, and explain that some unknown phenomenon is causing different universes to overlap in a potential Big Crunch.