✅ Highly recommended for players drawn to tragic tales of friendship, corruption, and survival—where two heroines must face unspeakable horrors and impossible choices in a world that feeds on their bodies and minds.

Bonds of Yachiyo follows Chiyo and her childhood friend Akari, two inseparable girls suddenly torn apart in a world twisted by lust, folklore, and creeping corruption.

You’ll alternate between Chiyo and Akari throughout the story—Chiyo focuses on stealth and evasion, while Akari gradually gains the means to resist and fight back. Erotic scenes are triggered through capture or traps, evolving in multiple phases depending on each girl’s corruption level (穢れ値). These affect CGs, dialogue, and ultimately the ending each heroine reaches.

With multiple branching paths, virgin-clear options, and a powerful finale that brings everything together, the game delivers an intense mix of fear, desire, and emotional storytelling.

Can Chiyo and Akari’s bond survive the darkness—or will you watch them drown in filth and desire?

✔Non-Consensual Sex (合意なし) ✔Female Protagonist (女主人公) ✔Oral ✔Vaginal ✔Anal ✔Lesbian (レズ) ✔Corruption (快楽堕ち) ✔Tentacles (触手) ✔Monster Sex (異種姦) ✔BDSM ✔Humiliation (羞恥) ✔Mind Break (精神崩壊) ✔Public Exposure (露出) ✔Exhibitionism (露出プレイ) ✔Rope Bondage (緊縛) ✔Group Sex (輪姦/乱交) ✔Threesome (３P) ✔Masturbation (自慰) ✔Breast Job (パイズリ) ✔Bukkake (ぶっかけ) ✔Watersports (放尿) ✔Ahegao (アヘ顔) ✔Virgin (処女) ✔Yuri / Female x Female (百合)

Horror, Puzzle Adventure, Erotic RPG, Mystery

None; Free patch available on the Saikey Studio official site to unlock all adult content.

4~10+ hours depending on endings, routes, and full erotic scene collection.

Medium; players must solve puzzles, evade monsters, and make choices that affect the endings. Several chase and stealth segments require timing and precision, especially on higher difficulties.

Detailed 2D CGs with a mix of horror and erotic styles. Uniform partial nudity, grotesque creature design, and multi-phase erotic events per monster or trap.

Atmospheric horror soundtrack complemented by chilling effects and moans during erotic events. Each major encounter is enhanced with distinct audio stingers and ambient dread.

Smooth performance with plenty of quality-of-life features: auto, skip, backlog, hint toggles, difficulty adjustments, and customizable horror intensity. Stable even during chase events.

Very High; 7 core endings and 1 final unlockable route based on corruption, purity, and player choices. All H-scenes are viewable from the start, but progressing naturally reveals their full variations.

👭 Dual Protagonists: Control Chiyo and Akari in separate chapters with distinct mechanics and routes.

🧩 Puzzle & Stealth Hybrid: Solve puzzles, escape from monsters, and avoid traps across a shifting, hostile school.

🩸 Multi-Phase Erotic Events: Each erotic scene has 2 distinct stages, with CG and voice changes depending on corruption level.

🕯️ Customizable Horror: Adjust scare intensity and chase difficulty; helpful hints can be toggled at any time.

📖 File Archive System: Lore entries and character logs track discovered secrets and deepen the mystery.

Bonds of Yachiyo is a dark and tragic erotic horror RPG about a girl’s desperate attempt to save her best friend from a supernatural nightmare. Switching between Chiyo and Akari, players navigate a cursed version of their school, where folklore, trauma, and lust twist reality. Each chapter introduces new mechanics—from pure puzzle-solving to stealth combat—and every step forward risks a gruesome trap or corruption scene. Its haunting world is as compelling as it is terrifying.

🧭 Exploration & Escape: Move through hallways, unlock secrets, and hide from creatures that chase you relentlessly.

🔍 Object Interaction: Investigate desks, lockers, and restrooms to find key items or trigger events.

🧠 Character Switching: In later chapters, freely swap between Chiyo and Akari to solve multi-layered puzzles.

🎭 Dynamic Erotic Content: Corruption level affects dialogue, visuals, and endings. Scenes evolve over time with multiple CGs.

🦴 Traps & Predators: Monsters range from mannequins to villagers and tentacles. Each can initiate 2-step erotic assaults.

💾 White Snake Save Points: Adorable snake spirits serve as save stations—20 slots available for easy backtracking.

At its core, Bonds of Yachiyo is a story of unwavering love and sacrifice. Chiyo, shy and broken from past trauma, finds herself alone in a twisted version of her school, desperately searching for Akari—the one person she trusts. Their bond is tested by haunting memories, folklore reborn in flesh, and a creeping corruption that changes both girls in body and mind. The story slowly unveils layers of betrayal, ritual, and fate, with multiple endings depending on the choices and state of the characters. It’s emotional, suspenseful, and unforgettable.

Bonds of Yachiyo is a haunting masterpiece of erotic horror storytelling. It combines stealth, puzzle-solving, and emotionally charged narrative with disturbing but artistically presented erotic content. The dual protagonist system keeps gameplay fresh, while the evolving corruption mechanics make each encounter meaningful. Even minor scenes are layered with consequences—whether you're unlocking a path or surrendering to pleasure.

The file system, glossary, and memory fragments immerse you in a twisted folklore where every item has history and every encounter leaves scars. And thanks to its replay-friendly structure, unlocking all endings—especially the emotionally impactful 'Kizuna & Kizuna' finale—is both achievable and satisfying.

Its horror is more than just jumpscares—it’s emotional dread, the fear of losing someone precious, and the cruelty of a world warped by tradition and sin. Whether you want tragic endings, redemption, or to simply savor the erotic unraveling of innocence, this game delivers on every front.

Simply put, Bonds of Yachiyo is one of the finest erotic horror games I’ve ever played.

👍 Dual heroines with distinct gameplay styles

👍 Hauntingly emotional story tied to Japanese folklore

👍 Multiple endings based on corruption and choices

👍 Erotic scenes evolve with corruption and include stat changes

👍 CG quality is excellent; no filler content

👎 Some late puzzles require trial and error

👎 No full animation (only illustrated CGs)

👎 A few chase sequences can be punishing without hints