A cyber battle sci-fi. In 2022, the technology of quantum computing has greatly advanced and many people have transfered their mind into the cyber space. Remu's sister, Shiki, skipped grades and entered a high school in the academic city "Okinotori-island Mega Float City (OMFC)" when she was 14. One day, Shiki confessed to her brother via Skype that she was talking to him directly from the cyber space and her real body had been kept in a water tank filled with a culture medium. It's called "Body pool" and Shiki connected to the network by nanomachines implanted in her brain. Remu was surprised but he accepted her decision until an accident called "Early Rupture" happened. The network server got overloaded and users' minds were lost in cyber space leaving soulless living bodies in the Body Pools. In order to bring Shiki's mind back, Remu visits her apartment in OMFC and there meets Shiki escaped from the hospital. But the girl tells him that she is not Shiki and she happens to haven taken over Shiki's body. When Remu tries to figure out the situation, a violent attack strikes the apartment.

Showa Era, year 101, summer. Kanaha who was being attacked by a rampaging battle weapon requested the help of a strange boy who was sleeping in a coffin. That was the moment where the two secured a pact of master and servant. The boy called himself Kichuu—the army's strongest weapon?!

None.

Risa Sakurai, physically the strongest girl in school, is invited by the beautiful Kayano Jun, who possesses a devilish intellect, to establish the Occult Research Club. The two strongest high school girls take on curses, horrors, and urban legends—!! (Source: Takeshobo, translated)

*Originally published on Twitter and collated by Ichijinsha for print release. Now serialised in Ichijinsha's ZERO-SUM Online.*

Touhou Chireikiden focuses on Satori Komeiji's endeavors as a detective, solving mysteries around Gensokyo.

The world was destroyed. A world filled with death and despair. The one who fought with a sword until the end — Sword God. Karselian Le Vandeyan. However, as if by fate, the door to another world opened, and this time… It was the Earth that had not been destroyed. There, monsters slowly appeared, and people were still living without knowing how great this disaster was. This world had not yet been destroyed. However, the moment they let their guard down, that terrible nightmare from the past would repeat itself. To prevent that Sword God takes up his sword again. He borrows the body of a weak human from the past and begins a new life. In exchange for taking over the body, he makes one promise. “I will protect your family.” And now, the real beginning. (Source: KakaoPage, translated)

Nagami Suzuka is a beautiful third-year middle school student who has excellent grades and is the student council president. She wrote a novel about a little sister who loves her brother too much to cope, and the novel wins a light novel award. After they discuss the matter, Yuu, her big brother, is the one who debuts as a proxy light novel author instead of Suzuka under the pen name Towano Chikai. *Includes volume 7.5 and 8.5.*