is a Japanese manga series written and illustrated by Oh! great. It began serialization in Kodansha's Weekly Shōnen Magazine in May 2024, and has been compiled into nine volumes as of August 2026.
Plot The series follows Jin, a young Japanese boy who lives in a world affected by mysterious phenomena known as the Night. One day, he meets Gao, a soldier who escaped from Britain to Japan ten months earlier after a Night manifested itself. Gao's ship crash landed, which resulted in the death of Jin's mother. The two live together in a rural town along with other residents while dealing with the effects of the Night.
Characters
A young boy living in the countryside. His mother was killed when Gao's ship crash landed in Japan.
A brigadier general in the British army. Ten months prior to the events of the series, a Night known as Catherine, the Night of Cyclones, appeared, killing his mother. Her dying wish was for him to go to Japan, leading to him heading there, only for his ship to crash.
A major in the British army and Gao's subordinate. The two became close after Gao's mother was killed.
A pair of conjoined twins who work as shrine maidens.
Publication Written and illustrated by Oh! great, Kaijin Fugeki started in Kodansha's Weekly Shōnen Magazine on May 29, 2024. The first volume was released on August 16, 2025. Nine volumes have been published as of August 17, 2026. The series is licensed in English by Kodansha USA, and it is simulpublished on the K Manga service.
Reception In October 2024, a Kodansha representative stated that the series was its best-selling new series of the past year. In May 2025, it was reported that the series had sold over 200,000 copies. The series was nominated in the Daruma for Best Drawing and Action Manga categories at the Japan Expo Awards in 2026.
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