Agent Sirius

[h1]Concise Game Review: Agent Sirius《エージェントシリウス・インタルード 悪堕ちが似合う彼女だって学園を変態宗教から守りたい！》— Corruption, Investigation, and the Fall of a Heroine[/h1] [i](Scroll down for the full review & verdict)[/i] [table] [tr] [th][b]🎮 Game Value[/b][/th] [td] ✅ [b]Strongly recommended for players who want a game where you play as a female agent investigating a school outbreak, where failure leads to routes where more characters fall under enemy control.[/b] You play as Akesuzu Beni, investigating incidents caused by “Poison” entities spreading across the academy. With multiple suspects, your goal is to find the culprit before things get out of control. Investigate, identify, and confront. Win to progress. Lose and the story continues as Beni and others fall under enemy control.[/td] [/tr] [tr] [td][b]👤 Protagonist[/b][/td] [td]Female Protagonist — Akesuzu Beni (朱雀 紅) / Agent Sirius[/td] [/tr] [tr] [td][b]🧬 Genre[/b][/td] [td]Adventure / Exploration AVG / Light Action / Adult (R18) / Corruption / Pleasure Fall / Mind Control / Brainwashing / Academy / Transforming Heroine / Chain Corruption / Harem / Group / Yuri[/td] [/tr] [tr] [td][b]🔞 Adult Content[/b][/td] [td] ■ [b]Core Themes[/b] ● Pleasu…

[後半に日本語レビューあり] [h1]A School Exploration ADV Where Corruption Cascades[/h1] Set in a high school, this exploration ADV follows a protagonist who serves as both detective club president and covert agent, pitting her against a brainwashing monster organization targeting the student body. Her "pleasure-weak" constitution is a sharply conceived irony: the one meant to protect the school is precisely the most vulnerable to its enemies — a tension that never fully lets up. Gameplay is anchored in campus exploration. The wide school map is navigated on foot, with NPC conversations and evidence-gathering driving the investigation forward. Combat is stripped down to evasion-only — dexterity takes a back seat to reading story choices and branching outcomes. What separates this from comparable corruption titles is the chain-fall design. Defeat unlocks five distinct corruption types — but the real hook is that a fallen protagonist can then turn and ensnare her own allies, placing the player on both sides of the equation. This mechanic is arguably what fueled the game's day-one all-genre top ranking on its original platform. The CG character designs are cohesive with rich expression variants …

Awesome and unique game. I'm glad to see so many good reviews but confused why so many only have 2 hours of playtime. The after story alone took me a little over 2 hours and the main game took me nearly 10 hours to beat and see everything. Loved that the ending perfectly set up a sequel as well. Definitely worth a buy and the price is more than fair even without a sale.

Not for me. I can get past the Japanese obsession with high school because it's an anime trope, and set the canonically underaged out of mind when they look like adults buuuut I can't deal with characters that look underage (even if they canonically aren't). And that's the first character that disrobes. Nope nope nope.

Developed by Lunarian and published by Saikey Studios, Agent Sirius is a narrative-focused RPG that combines detective work, supernatural mystery, and character-driven storytelling into an adventure that prioritizes investigation over traditional role-playing mechanics. Set within the seemingly peaceful Star Haven High School, the game follows Beni Akesuzu, the leader of the school's detective club who secretly serves as an operative for Bancho, an organization dedicated to confronting paranormal threats. What begins as a series of strange disappearances and unsettling rumors involving female students gradually evolves into a much larger conspiracy, drawing Beni into a dangerous conflict where the line between ordinary school life and the supernatural becomes increasingly blurred. The premise immediately establishes an intriguing atmosphere, giving players plenty of reasons to uncover the truth hidden behind the school's familiar halls. The game's greatest strength lies in its emphasis on detective gameplay. Rather than constantly pushing players into combat, Agent Sirius encourages them to explore every corner of the campus, question classmates, inspect suspicious locations, and …

I like it when girls get corrupted