Developer Mango Factory and publisher Akupara Games have released Kumitantei: Old-School Slaughter Episode 2, titled Gloomy Shojo Sunday, on PC via Steam. The new chapter launched on November 12, 2026, continuing the episodic murder-mystery adventure following the events of its first installment. A new launch trailer has also been released alongside the update.
Episode 2 follows protagonist Himari Sanada and the remaining members of the Absolute Class of ’89 as they explore another area of the underground facility where they are being held captive. The newly opened floor resembles a summer beach, offering an artificial retreat from the deadly events of the previous chapter.
The students initially attempt to use the beach environment to strengthen their relationships and prevent further violence. However, their efforts are disrupted when Nyanus, the mysterious cat overseeing the experiment, introduces another variable into the situation. The resulting tensions set the stage for a new murder mystery.
Kumitantei: Old-School Slaughter combines visual novel storytelling, investigative gameplay and card-based courtroom battles. Inspired by classic 1980s anime and Japanese murder-mystery adventures, the game follows a group of exceptionally talented students trapped in a deadly experiment.
Players investigate crime scenes, gather evidence and develop relationships with classmates while attempting to identify those responsible for the killings. Its card-battling mechanics distinguish the game from conventional detective adventures, allowing players to use cards obtained through their interactions during trials.
Gloomy Shojo Sunday continues the existing story rather than introducing a separate standalone game. Players who already own Kumitantei: Old-School Slaughter on Steam receive Episode 2 as part of their original purchase, without needing to buy the chapter separately.
Mango Factory previously confirmed the November 12 release date and announced that the game’s standard price would increase from $14.99 to $19.99 USD with the arrival of Episode 2. The developer also confirmed that purchasing the game provides access to future episodes as they become available.
The new chapter is available through the existing Steam release on PC. Although Kumitantei: Old-School Slaughter is also available on Nintendo Switch, the November 12 Episode 2 launch announcement specifically concerns the PC version.
With Gloomy Shojo Sunday now released, players can continue Himari’s investigation and uncover the next stage of the Absolute Class of ’89’s deadly experiment.
