Sex Trainer's Diary: Hidden Kink

Sex Trainer's Diary: Hidden Kink

老二打鐵舖 · 2026 · Casual, Simulation, Sexual Content, Walking Simulator, Life Sim

PC
Mostly Positive77% · 158
This game is free to play. Get it on Steam →

Screenshots

About Sex Trainer's Diary: Hidden Kink

【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 PartTrail 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!▲ Free Exploration PartTake control of Mio and experience the world through her own eyes. Hunt down hidden events and tons of super naughty content!A completely fresh and addictive gameplay experience — ride a bicycle, shoot targets with a handgun, change outfits, and enjoy many more unique mechanics you’ve never seen before!Multiple exciting events: Help NPCs with their requests to unlock even more exclusive content and sizzling CGs!▲Sex PartOnce you capture Mio, you can enter the 3D sex mode!Fully voiced with a variety of positions for an immersive experience. ▲ Convenience Store PartInside 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 PartRunning low on funds from buying too much gear? You can also play minigames within the store to earn extra cash!

【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!

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jul 2, 2026
[後半に日本語レビューあり] [h1]Stealth-Stalking 3D H-Sim: The Secretly Kinky Convenience Store Girl[/h1] A stealth-based 3D H-simulation starring a sex trainer who receives an unusual commission from Mio, a girl working at a convenience store: "Please stalk me home." While satisfying her hidden fetishism, the story between the two gradually unfolds. With its unique structure of "consensual stalking," this is an ambitious work that reconstructs the stalking game genre--once a fixture of Japan's PC gaming scene--in a modern 3D setting. (Personally, I was a fan of "Hana no Himei," but... well, a lot happened with that one, didn't it.) The highlight of the game lies in the stalking segments. You approach Mio from behind while staying out of her line of sight, using cover and terrain, and when her stamina is fully drained, an H-scene begins. Getting spotted too many times results in a game over, so observing the environment and reading the timing is essential. Three maps are available--residential, train, and park--each with its own atmosphere and difficulty. The early stages are somewhat challenging, but purchasing items with funds earned from minigames gradually expands your strategic options. …
18 found this helpful
Recommended Jun 27, 2026
The tailing game is not particularly difficult, with fairly obvious hints. There's a tailing alert threshold to manage during the process—just keep it under control. When it's almost full, find a spot to hide and reset. If you succeed in tailing, you can move on to the training phase. The rewards are quite nice, and the female character's modeling is impressive, with a variety of poses.
2 found this helpful
Not recommended Jul 5, 2026
I wouldn't say that the game is "bad" per se, it's just not good enough for the money. For 20 bucks I can get tons far better games with more content - completing the main story in around an hour is simply not enough. Yes, there's more content to unlock in the "inferno mode" but that just seems like a chore. Sadly, the basics of the game are fine and I was considering giving the game a positive review, but in the end, it just didn't convince me. If they'd put more levels in and at least some variation to the grind it would be fine. A shame, I do like Mio and I do want to like this game, I just can't. If they were to make a second iteration of this game and give it 3 times the effort (and content) then we'd certainly have a banger.
1 found this helpful
Not recommended Jun 29, 2026
Amazing concepts. Lackluster execution. If you like collecting achievements, it's not hard. If you enjoy stalking, the gameplay isn't hard. If you were looking forward to the sex cutscenes, you're not gonna get hard. The 3D scenes are unpolished, considering the price point. [Main Issue, Artwork] I'm giving grace to the developers, assuming they are not artists. I hope they continue to make new games. They've already disclosed AI-assistance was used for BGs. However...the character artwork/ event illustrations seem to be AI-assisted (Truly sorry if I'm wrong about this!). I noticed white pixels around transparent images. Artists (for this level of quality/skill) set up their file to cleanly export transparent images. Even IF there is no AI-usage, the sex cutscenes lack interesting composition / poses. The sex appeal and mood-building were lacking. So the work you do to get to the sex scene didn't feel worth it. [Favorite] - Concept (exhibitionism, forced exposure, public sex, etc.) - Main girl's personality and design [Neutral about] - The stalking gameplay. After 2-5 attempts, you will understand how it works. It is slow in the beginning. You definitely need buy upgrades…
1 found this helpful
Not recommended Jul 8, 2026
don't have a real story, CG are just some not moving images, each scene are just 1 animation repeatedly, , the char in scene don't even match what it expected to show in the image when climax, don't show any emotion Dev too lazy, they only add a image to show char emotion when they can add that emotion directly to the scene. Mini game are just some random thing to do to waste time, don't have any meaning in story
Not recommended Jul 3, 2026
Way too poorly optimized, especially for a game with closed environments. Game is also way too short and basic for 20 bucks, maybe worth $5 or $10 at a stretch, but otherwise I just don't think it's worth it. Also says that AI was only used in backgrounds while the characters are done by artists, but I just don't believe that. Using AI is supposed to reduce cost (both on the developer and consumer) not increase it.

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