After earthquakes suddenly took place in the Kumamoto Prefecture, Natsuna Keyaki lost contact with her dearest online friend, Itsuki. With nothing but a drawn picture of the landscape, Natsuna embarks on a journey from Tokyo to Kumamoto to find her. When Natsuna gets lost in a rural area of the disaster-stricken prefecture, she encounters a policeman and an energetic middle school girl named Izumi Chiba. Izumi, along with her hospitable family members, offers Natsuna shelter and information to assist her in her quest. With these kind locals helping her on every step of the way, Natsuna moves closer to discover what happened to Itsuki.

A world where it has been established that people routinely swing between slightly different parallel worlds... Koyomi Takasaki, who lives with his mother following his parents' divorce, enrolls in a local university prep school. Due to the atmosphere concentrated on studies and his social awkwardness, Koyomi is unable to make friends. One day, he is suddenly approached by his classmate Kazune Takigawa, who tells him that she has travelled from the 85th world where she and Koyomi are lovers.

Chu Yue, the ace of the modern Z organization, was framed to death, and under the guidance of the system's Nine Desolation Mirror, his soul traveled to the Nine Desolation World, and under the system's mandatory tasks, he continued to practice and become stronger in order to survive. While performing system tasks and practicing adventures, Chu Yue discovered the shocking secrets hidden in the original owner of the body he was wearing. As Chu Yue unearthed more and more secrets about the original owner of the body, he unexpectedly discovered that he was not the only host of the Nine Desolation Mirror System, but there were other hosts of the Nine Desolation Mirror System in the Nine Desolation World.

The Amanto, aliens from outer space, have invaded Earth and taken over feudal Japan. As a result, a prohibition on swords has been established, and the samurai of Japan are treated with disregard as a consequence. However one man, Gintoki Sakata, still possesses the heart of the samurai, although from his love of sweets and work as a yorozuya, one might not expect it. Accompanying him in his jack-of-all-trades line of work are Shinpachi Shimura, a boy with glasses and a strong heart, Kagura with her umbrella and seemingly bottomless stomach, as well as Sadaharu, their oversized pet dog. Of course, these odd jobs are not always simple, as they frequently have run-ins with the police, ra rebels, and assassins, oftentimes leading to humorous but unfortunate consequences. Who said life as an errand boy was easy? [Written by MAL Rewrite]