9-Nine

Shiromitsugawa City is a sleepy college town consisting of various high schools. Living by himself away from his family, Kakeru Niimi enjoys a peaceful life as an ordinary student until a major earthquake shatters the sacred artifact at the local Hakuda Tsukumo Shrine.

In the wake of this event, where Kakeru's world is now connected to an alternate world, artifacts that awaken superhuman abilities begin to show up in young men and women in the town, and one such Artifact User emerges as a serial killer.

Kakeru is approached by his classmate Miyako Kujo to track down this serial killer, and in doing so, becomes embroiled in the ensuing chaos between the Artifact Users.

9-nine - Kokonotu Kokonoka Kokonoiro

The first instalment in the series focuses on the first of the four heroines, Miyako Kujo. After finding a petrified human in their college town, Shiromitsugawa City, Kakeru and Miyako work together to investigate the culprit behind this incident. This game can be played on its own without knowledge of the other series instalments.^[3]

9-nine - Sorairo Sorauta Soranooto

The second instalment in the series focuses on the second heroine, Sora Niimi. The story branches off from the first game, Kokonotsu Kokonoka Kokonoiro, and focuses instead on the romance between Kakeru and his sister Sora while they work with Miyako to track down the Artifact User petrifying people in the town. This game can be played on its own without knowledge of the other series instalments.^[4]

9-nine - Haruiro Harukoi Harunokaze

The third instalment in the series focuses on the third heroine, Haruka Kosaka. The story branches off from the second game, Sorairo Sorauta Soranooto, and focuses on the budding romance between Kakeru and Haruka. Kakeru's group runs into the Artifact User organisation Rig Veda, who appear to oppose their efforts to investigate the serial killings. This game can be played on its own without knowledge of the other series instalments.^[5]

9-nine - Yukiiro Yukihana Yukinoato

The fourth instalment in the series focuses on the final heroine, Noa Yuki, branching off from the third game, Haruiro Harukoi Harunokaze. Having uncovered the mastermind behind the incidents, and realizing Noa's Artifact is the key to defeating the mastermind, Kakeru divulges everything he knows about the matter. Together, they oppose the mastermind and uncover the final secrets behind the Artifacts that arrived in their world.

Due to the story structure of this game, it is strongly recommended that this game be played only after completing the previous three games.^[6]

9-nine - Shinsho

The final instalment in the series ties up loose ends from the previous four chapters with after-story scenes for each heroine. There is a new scenario featuring a story that is yet to find salvation, the final, unfinished task Kakeru has yet to complete.

It is strongly recommended that this game be played only after completing all previous games.^[7]

Kakeru Niimi (新海 翔, Nīmi Kakeru)

Voiced by: Atsushi Abe^[8]

Miyako Kujō (九條 都, Kujō Miyako)

Voiced by: Misato Fukuen^[8]

Sora Niimi (新海 天, Nīmi Sora)

Voiced by: Atsumi Tanezaki^[8]

Haruka Kōsaka (香坂 春風, Kōsaka Haruka)

Voiced by: Yuri Yamaoka^[8]

Noa Yūki (結城 希亜, Yūki Noa)

Voiced by: Akane Fujita^[8]

Sophitia (ソフィーティア, Sofītia)

Voiced by: Satomi Arai^[8]

Satsuki Naruse (成瀬 沙月, Naruse Satsuki)

Voiced by: Hana Takeda^[8]

Yoichi Fukazawa (深沢 与一, Fukazawa Yoichi)

Voiced by: Kazutomi Yamamoto^[8]

Renya Takamine (高峰 蓮夜, Takamine Renya)

Voiced by: Tomokazu Sugita^[8]

Manga

A manga adaptation illustrated by Izumi Kawachi began serialization on Futabasha's Gaugau Monster website on October 22, 2021.^[9] The manga's chapters have been collected into two tankōbon volumes as of July 2025.^[10]

More information No., Release date ...

No.	Release date	ISBN
1	July 3, 2025[11]	978-4-575-44095-9
2	July 3, 2025[10]	978-4-575-44096-6

Close

Anime

An anime television series adaptation was announced on May 29, 2024.^[12][13] Titled 9-Nine: Ruler's Crown, the series is produced by PRA and directed by Koichi Ohata, with series composition handled by Kōsuke Koremizu, characters designed by Saori Sakiguchi, and music composed by Yamazo. The cast from previous games reprised their roles.^[8] The series aired from July 5 to September 27, 2025, on Tokyo MX and BS NTV. The opening theme song is "ResoNAnce", performed by Araki,^[14] while the ending theme song is "Pale Blaze", performed by Chihiro Yonekura.^[15]

Episodes

More information No., Title ...

No.	Title [16]	Directed by [a]	Written by [a]	Storyboarded by [a]	Original release date [17]
1	Branch 01	Yoshitaka Koyama	Kiyoko Yoshimura	Koichi Ohata	July 5, 2025 (2025-07-05)[b]
2	Branch 02	Naoki Hishikawa	Kiyoko Yoshimura	Koichi Ohata	July 5, 2025 (2025-07-05)[b]
3	Branch 03	Ryō Ōkubo	Fuka Ishii	Koichi Ohata	July 12, 2025 (2025-07-12)
4	Branch 04	Harume Kosaka	Fuka Ishii	Harume Kosaka	July 19, 2025 (2025-07-19)
5	Branch 05	Shiho Takahashi	Hiro Akizuki	Katsuhiko Nishijima	July 26, 2025 (2025-07-26)
6	Branch 06	Naoki Hishikawa	Hiro Akizuki	Shin Katagai	August 2, 2025 (2025-08-02)
7	Branch 07	Ryō Ōkubo	Hiro Akizuki	Koichi Ohata	August 9, 2025 (2025-08-09)
8	Branch 08	Harume Kosaka	Hiro Akizuki	Harume Kosaka	August 16, 2025 (2025-08-16)
9	Branch 09	Youhei Honma	Kiyoko Yoshimura	Koichi Ohata	August 30, 2025 (2025-08-30)
10	Branch 10	Arai Masaki	Fuka Ishii	Koichi Ohata	September 6, 2025 (2025-09-06)
11	Branch 11	Naoki Hishikawa	Fuka Ishii	Koichi Ohata	September 13, 2025 (2025-09-13)
12	Branch 12	Ryō Ōkubo	Kiyoko Yoshimura	Koichi Ohata	September 20, 2025 (2025-09-20)
13	Branch 13	Yoshitaka Koyama	Kiyoko Yoshimura	Koichi Ohata	September 27, 2025 (2025-09-27)

Close