| Title | Format | Country | Volumes | State |
|---|---|---|---|---|
| Jinrui wa Suitai Shimashita人類は衰退しました | Light novel | Japan | 6 | Unfinished (suspended publication) |
| Jinrui wa Suitai Shimashita人類は衰退しました | Light novel | Japan | 11 | Completed |
| Jūō Mujin no Fafnir銃皇無尽のファフニール | Light novel | Japan | 8 | Ongoing |