Aquarium wa Odoranai Prequel Opens Steam Store Page
The store page launch confirms the prequel's direction as a horror adventure centered on Hikaru's 24-hour countdown and her encounter with the cleaner wrasse maid Horo, following the series' established pattern of character-driven horror.
Reporting from 1 source: Game Spark.
Frontier Works opened the Steam store page for 'Aquarium wa Odoranai: Shinitagari no Idol,' the prequel in the horror ADV series by creator To To. The game follows Hikaru, an underground idol whose singing puts listeners to sleep, as she visits Bianca Aquarium seeking a painless death. It is scheduled for release on PC via Steam.
The sequel was officially announced in February 2026, and the store page went live on August 1. The synopsis centers on Hikaru, a struggling idol who comes to Bianca Aquarium wanting to die without suffering. She meets Horo, a self-proclaimed world's cutest, arrogant maid who is a cleaner wrasse, conducting water funerals for people who want to die.
The ritual goes wrong when Horo's ring, adorned with a blue stone, is swapped with a fake. A culprit with white skin and red eyes appears and vanishes, leaving Hikaru and Horo to retrieve the ring. The game is scheduled for release on PC via Steam.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.