Osamu Mikumo (chapter)

Long summary
Near an enormous building, smoke emanates, and a loud noise can be heard. A boy in glasses wearing a school uniform covers his face with his arm, in surprise. Another, older boy, standing over a giant monster, looks down at him and asks if he's alright.

It is then explained what happened in Mikado City: A gateway to a parallel universe opened in this city, and from it came Neighbors, creatures who attack the city. The world in the other side of the gateway possessed a different technology, which made Earth's technology useless against them. When all hope was lost, a mysterious group formed to repel the Neighbors.

They started researching the Neighbors' technology, known as Trigger, and used it to defend the world. In a short period of time, they quickly built huge heardquarters. The organization became known as Border.

Flashforward 4 years, the gate is still opened, but the number of people leaving the city has decreased. This was because people's faith in Border had been growing stronger, but also because they got used to the flashes and explosions which would sometimes reach them.

Characters in order of appearance

 * Osamu Mikumo (debut)
 * Yūichi Jin (flashback) (debut)
 * Takumi Rindō (flashback) (cameo)
 * Masafumi Shinoda (flashback) (cameo)
 * Yūma Kuga (debut)
 * Replica (debut)

Trivia

 * On page 18, one of the bullies is reading Super Dog Rilienthal, Daisuke Ashihara's first serial on Weekly Shonen Jump.