Screenshots
Watch trailer on Steam ↗Sex Trainer's Diary: Hidden Kink
072 Localize, 老二打鐵舖, NOVA CONCEPT · Published by Oπ
Content notice: This game contains sexual intercourse, sexual harassment, and consensual stalking scenarios.
Mostly Positive — 75% positive (220 reviews) · 33 achievements
Last updated 28 Sept 2026
This is a stealth-based adult simulation game where you follow the mysterious woman, Mio, and interact with her to uncover her secrets. As a professional trainer, you will fulfill Mio's unique desires while gradually revealing the hidden story between the two of you.
£16.75
Lowest price we've ever recorded
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Price history
Indie, Simulation, Casual · 2026 · More £15 - £30 games
Follow Mio's mysterious lead as a professional trainer, uncovering her secrets through stealthy interactions. Dive into the casual yet intriguing world of Sex Trainer's Diary: Hidden Kink.
About this game
【Story】
One day, as an expert Sex Trainer,
you receive a commission that defies all expectations.
A client with a sweet, breathy voice whispers a shocking request:
"Could you... please stalk me home?"
It is an unheard-of request, but face-to-face with the ultimate temptation of breaking in such a beauty, how could a professional say no?
Rock-hard and ready for action, you head straight to the convenience store where she works to see exactly what you’re dealing with...
【Game Description】
★ This is a thrilling simulation game where YOU become the ultimate Sex Trainer. Your job is to dive deep into the hidden kinks of the adorable heroine Mio, unlock a massive collection of hot, intense sex scenes and CGs, and slowly uncover the main story as you push the game forward.
★ In Free Mode, take full control of Mio herself and explore the world freely through her eyes!
★ This isn’t just another ordinary hentai game — it’s packed with huge, expansive scenes and immersive environments waiting for you to discover!
"I want you… to secretly follow me.”
This super cute convenience store girl actually has a secret stalking fetish! Just thinking about her adorable face and that juicy, voluptuous body makes you want to grab her hips and slam into her ass hard.
Unleash every dirty desire you’ve been holding back on her lewd, dripping body. Satisfy Mio’s darkest secret kink and unlock even more wild positions and playstyles!
【Gameplay】
▲ Follow Part
Trail Mio on her way home, but be careful—do not enter her field of view!
If you get caught too many times, it’s GAME OVER!
Master the environment by using items found on the ground and
diving into hiding spots to evade her gaze!
▲Sex Part
Once you capture Mio, you can enter the 3D sex mode!
Fully voiced with a variety of positions for an immersive experience.
▲ Convenience Store Part
Inside the store, you can purchase items to make the Stalking easier.
But that's not all... Chat with Mio, get a little handsy,
and you might just unearth her "deepest, darkest fetishes" ♥
▲ Minigames Part
Running low on funds from buying too much gear?
You can also play minigames within the store to earn extra cash!
▲ Open World Part
After completing the tracking phase, you can now experience the open world from Mio’s perspective!
⏹︎ Quest System
A variety of quests and dialogues have been added for you to trigger. There are even plenty of unexpected (?) events waiting to be discovered.
⏹︎ Outfit System
4 outfits are available for you to change into.
⏹︎ Shooting System
Once you obtain the toy gun, you can shoot at the strange birds along the paths and test your shooting skills.
⏹︎ Bicycle System
After getting the bicycle, moving around the map becomes much easier and more fun.
【Features】
Three fully explorable maps:
Residential District, Train, and Park — each with its own unique atmosphere, style, and difficulty level.
Stalking System:
Sneak up on Mio from behind, slowly drain her stamina, and trigger intense sex scenes when the moment is right.
Sex Scenes:
Satisfy Mio’s burning lust with a huge variety of high-quality 3D sex positions that feel incredibly real!
CG Collection:
Complete sex scenes to earn beautiful CG illustrations. Revisit and admire every single one in the Gallery Mode anytime you want.
Affection System:
After each steamy encounter, Mio will rate your performance. The higher your score, the more her affection rises, unlocking even more exclusive CGs and special scenes!
Full Voice Acting:
The entire game features complete Chinese voice acting for Mio, bringing every moan, whisper, and shy line to life!
※Some background images were created with the assistance of AI. All character artwork and event illustrations were hand-drawn by the artist.
System Requirements
Will my PC run this? →Minimum
- OS: Windows® 10 64-bit
- Processor: Intel® Core™ i3 9th Gen or higher
- Memory: 8 GB RAM
- Graphics: NVIDIA® GeForce® GTX 1060, DirectX Version 11
- Storage: 4 GB available space
Recommended
- OS: Windows® 11 64-bit
- Processor: Intel® Core™ i5 12th Gen or higher
- Memory: 16 GB RAM
- Graphics: NVIDIA® GeForce® RTX 3060, DirectX Version 12
- Storage: 20 GB available space
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
【Update Notes】2026/07/01
Update Notes:Fixed an issue where the mini-game could occasionally crash.Optimized game performance by enabling V-Sync and an FPS cap by default to improve overall stability.Added Windowed Mode and resolution switching.Fixed an issue in existing save files where items could be duplicated or their information failed to display correctly.Various performance improvements and bug fixes.Read full article on Community Announcements (NG.C)AnnouncementsOfficial
[Development Insight] Character Illustration Creation Process
Thank you for your continued support and interest in Sex Trainer's Diary: Hidden Kink!We recently received some production materials for the character illustrations from the development team, and we have put them together to share with all players.The materials shown here include selected sketches and work-in-progress images. We hope they offer a closer look at the character design and illustration process behind the game. We would like to thank the development team for providing these materials, and once again, thank all players for your support and interest in the title!Follow us! Steam X DiscordRead full article on Community Announcements (ROSE MAN)AnnouncementsOfficial
Targeted by Succubi, From Both Sides — Will Their Bond Hold? 🔥
The war between the Demon King's army and humanity has only just ended. Leo, a young man of fallen nobility, and Luna, his loyal attendant, stand as the last line of defense protecting a kingdom's most sacred treasure.Twenty days remain — and in that time, a succubus quietly infiltrates the estate, working her way through their bond, piece by piece.He is seduced by a female succubus. She is ensnared by a male succubus — NTR and reverse-NTR unfold simultaneously.Their feelings for each other are tracked in real time through the "Two Hearts" system, shifting quietly with every choice you make.Every decision is yours. And the ending depends on what you manage to hold onto. 🔥 4 endings — both fall, only she succumbs, or the true ending where they protect each other.Wishlist it now and be the first to know when it goes live 📢Set in the same world as the previous title Crypt's Rend ~NTR~ — new players can jump right in. 🔥COMING SOONFollow us! Steam X DiscordRead full article on Community Announcements (kawaii_makiuwu)AnnouncementsOfficial
They Once Saved the World. Now They Belong to Someone Else.🔥
Ten years ago, they defeated the Demon King together and restored peace to the world.Then they went their separate ways, built their own lives, and quietly folded away those days of fighting side by side — tucking them into the deepest corners of memory.Now a new Demon King is stirring. The old heroes gather once more, only to find that the years have silently taken their strength with them.The only solution is a forbidden magic known as "Spirit Invocation." The righteous find light. The fallen find desire — and which path you walk has always been your choice.Pure love or temptation, 12 endings each leading to a different future.Those days of youth… perhaps they never truly ended. 🔥Now… it's your turn to be the hero. Wishlist it now and be the first to know when it goes live 📢COMING SOONFollow us! Steam X DiscordRead full article on Community Announcements (kawaii_makiuwu)AnnouncementsOfficial
Devlog: From Chasing to Free Exploration — Mini World, Bicycles, and New Outfits
Hello everyone,Recently, the development team "老二打鐵舖" has not only optimized the core gameplay of "Sex Trainer's Diary: Hidden Kinks" but also significantly expanded the post-game free exploration content and various systems. Below are the highlights of the future updates: New Outfits Implemented To increase visual variety, the team has implemented several new outfits. Players can now change the heroine's appearance according to their preferences. "Mini World" Mode (Post-Story Exploration)After completing the main storyline, players will unlock the Mini World Mode. In this mode, you can explore the city more freely. Bicycle Movement A new feature allows the heroine to ride a bicycle, making movement across the large map faster and more dynamic. Mini World QuestsMultiple map quests have been added to provide more objectives and rewards during city exploration. Graffiti System and Scene Interaction Several interesting interaction mechanisms have been added. Fast Travel and Convenience Features Taxi System: Players can interact with taxis to fast travel between different areas, reducing unnecessary commuting. New CGs and Event Updates Several high-quality CGs and their corresponding story plots have been updated. The content of "Sex Trainer's Diary: Hidden Kinks" is becoming more refined every day. If you enjoy the new features introduced this time, please be sure to add the game to your Wishlist!Read full article on Community Announcements (ROSE MAN)
