Sakuma is a college student who works part time at the Akutabe detective agency. There she does regular office work for private investigator Akutabe. However, Sakuma soon learns that Akutabe is no ordinary detective, but in fact a demon detective. He is able to summon demons through the use of a grimoire and use each of their special abilities by providing an offering. He uses their magical powers to solve the case he is working on and he wants Sakuma to start learning demon summoning. As Sakuma begins her journey to be a demon detective, little does she know the repercussions of using demons. ---

A series in *Young Magazine* and *Young Magazine the 3rd* where authors create the 100th chapter of a series… without creating Chapters 1–99 first! 1. *Offside Trap* by Kumeta Kouji ([Young Magazine 2015 No. 6](https://magazine.yanmaga.jp/ym/2015/2015-6.html)) Ashida Isami is the star player of the Kota High Soccer Club, and childhood friends with its manager, Kaneda Chiyo. Just as his teammates go missing, his mysterious rival recovers from an injury… 2. *Look Forward To When You Eat It!* by Ooima Yoshitoki ([Young Magazine the 3rd 2015 No. 2](https://magazine.yanmaga.jp/ym3/2015/2015-2.html)) (Raw: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/01/11/110000)) 3. *Bravery Saga* by Yoshimoto Masume ([Young Magazine the 3rd 2015 No. 3](https://magazine.yanmaga.jp/ym3/2015/2015-3.html)) (Raws: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/01/15/110000), [Comic DAYS](https://comic-days.com/episode/10834108156652934194)) 4. *BattleSexer SEISHIROU* by Kubo Yasuhisa ([Young Magazine the 3rd 2015 No. 4](https://magazine.yanmaga.jp/ym3/2015/2015-4.html)) (Raw: [Comic DAYS Blog](https://comic-days.com/blog/entry/3rd100/seishiro)) It's the 23rd century, an age of science and technology, and sex is no longer required to reproduce. However, humanity has not forgotten sex! Sex has evolved to become a form of martial arts, and those who practice it are known throughout the world as BattleSexers! 5. *New Oni Legend - Any Crying Children Here‽* by Oshikiri Rensuke ([Young Magazine the 3rd 2015 No. 5](https://magazine.yanmaga.jp/ym3/2015/2015-5.html)) (Raw: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/01/30/110000)) 6. *Simple Z ~The Perfect Detective Kanta's First And Last Case~* by Suzuki Nakaba ([Young Magazine the 3rd 2015 No. 6](https://magazine.yanmaga.jp/ym3/2015/2015-6.html)) (Raw: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/01/18/110000)) 7. *Mosaic!!* by Umeda Abi ([Young Magazine the 3rd 2015 No. 6](https://magazine.yanmaga.jp/ym3/2015/2015-6.html)) (Raw: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/01/22/110000)) 8. *Wish For Sasa ★* by Yamamoto Souichirou ([Young Magazine the 3rd 2015 No. 7](https://magazine.yanmaga.jp/ym3/2015/2015-7.html)) - **Included in [Love Letter -Yamamoto Souichirou Short Story Collection-](https://mangadex.org/title/75de5e90-9621-4c0f-899f-056a90ef0061)** 9. *BOWWOW Providence ―An Alternative View Of The Eight Dog Chronicles―* by Segawa Masaki ([Young Magazine the 3rd 2015 No. 8](https://magazine.yanmaga.jp/ym3/2015/2015-8.html)) (Raw: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/02/01/110000)) 10. *The Very Delish Restaurant Kirishima!!* by Seo Kouji ([Young Magazine the 3rd 2015 No. 9](https://magazine.yanmaga.jp/ym3/2015/2015-9.html)) (Raws: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/01/08/110000), [Twitter](https://x.com/seokouji/status/1176861725779316736)) 11. *Sacrificial Shrine Maiden Touya* by Yoshimura Kana ([Young Magazine the 3rd 2015 No. 12](https://magazine.yanmaga.jp/ym3/2015/2015-12.html)) (Raws: [Comic DAYS Blog](https://comic-days.com/blog/entry/2018/01/25/110000), [Comic DAYS](https://comic-days.com/episode/10834108156637582736))