Osta Agent Sirius PC

An uneasy atmosphere grips Star Haven High School. Mysterious incidents targeting girls begin to unfold one after another, and rumors soon spread of things more suited to urban legends. And it is up to Beni Akesuzu as the head of the detective club to get to the bottom of these incidents.

But even she has a secret: she’s a secret agent for Bancho, a secret organisation specialising in dealing with the supernatural, and they know the truth. That real monsters lurk in the shadows, plotting to brainwash everyone in the school.

So far, Beni has narrowed her list of suspects, including both teachers and students. Now, it’s up to her and her friend, a fellow detective club member Nadeshiko to track down the culprits and solve the puzzle in a race to save the school and its students before it’s too late!

Investigate the eerie incidents that have occured at Star Haven high school. Explore the campus, gather clues, solve puzzles, and interact with a wide cast of characters to uncover the truth. And when the time comes, battle sinister foes with Beni’s unique skills and gadgets to protect everyone from the enemies hiding in the shadows!

Team up with Nadeshiko Shiratora, your loyal partner, as you navigate secrets, danger, and the weight of Beni's dual identities.

With unique battle challenges, a wide cast of characters, each with a story to tell, and an ever present mystery looming over all the students' heads, can you crack the case before it’s too late?

Investigation and Exploration

Explore the school grounds, gather clues, and interact with a wide cast of characters to unravel the mysteries that you come across.

Find the culprit

Analyze the evidence you find to identify the suspects from the cast of characters you meet, each with unique backgrounds and potential motives.

Unique Encounters

Put everything on the line to protect the studnets of the school by engaging in unique challenges against the sinister entities lurking in the shadows once you have forced them into the light.

Choices Matter

Your choices influence the story, leading to different consequences that will affect you in the game and even leading you to one of the different endings. Your choices will even shape Beni's relationships with other characters, particularly with her partner, Nadeshiko.