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Why did I become a girl?I am the Chikan who has brought many women to orgasm, and today I will be brought to orgasm instead.The woman who calls herself a god wants me to collect 1000ml of sperm to become a man.Damn! I want to fuck her, but where is my dick?Ahhhh! My proudest penis is gone!
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
How it worksTracked since Jul 7, 2026.
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The classic novel of sexual transformation "痴漢達人變女生"(Molester Master: Transformed into a Girl), which has been circulating on the Internet for more than 13 years, has been gamified by the author himself! It is not just a visualization of a novel, but a rich, interactive experience where the story has been completely reimagined and rewritten to fit the game. So if you like erotic games, this title will certainly offer something that hits all the right “spots” —whether you're looking for excitement or pleasure.
The protagonist is a Chikan who wants to conquer all the women in the world for his own desires and ambitions, but one day a woman who called herself God appeared and turned the protagonist into a woman, demanding that the protagonist collect 1000ml of sperm within 2 years, or else he would die.
Just when the protagonist thought that turning into a woman and collecting sperm was strange enough, he become entangled in even more extraordinary events. By a twist of fate, he comes across the "Book of Eibon" from the Cthulhu myth, a book that reveals to the protagonist the desired world of "The Northernmost Continent: Hyperborea."
It's up to you if you want to satisfy your curiosity and risk lowering your SAN to explore the legendary Hyperborea, or if you want to focus on being an ordinary man and collect 1000ml of sperm to become a man again.
"All the women in the world are my playthings! …wait, where's my penis? Can I only get pleasure from my vagina now? Nooooo~"
The president of the Chikan Association, having toyed with countless girls, was punished by the gods and transformed into a girl. Now, with no penis, he must rely on her vagina for pleasure. Following the gods' orders, he collects sperm and searches for the truth behind her transformation.
"Big sis, you really love cock~❤"
The top courtesan at the maid café 'Black Feather Café'—after the protagonist joins the café as a maid, she comes to regard the protagonist as an older sister.
Every month, the café holds a "Fan Appreciation Festival" where only customers with enough accumulated spending can participate. It is said that this special event is the reason why Black Feather Café stands firmly on the rankings.
"W-Wait, no hotel hostess would behave like this!!"
A dedicated and responsible hotel manager, due to the protagonist's outstanding performance, mama-san agrees to the protagonist's request, which is to have access to Luna's body.
"The girls you've toyed with are really pitiful... Let’s see how it feels for you to experience what they went through! "
The powerful being that suddenly appeared in the protagonist's room turned the protagonist into a girl, and then demanded that the protagonist collect 1000mL of sperm within two years, or else she would die when the time is up.
"My disciple, your potential must be greater than this."
The protagonist is invited to join a private tutoring institution, the "Mobius Academy," where the teacher in charge of martial arts instruction will gift her a mysterious outfit after meeting certain conditions. This outfit is a key item for unlocking the mystery.
"Miss, does this feel good?"
Guided by her colleague Nina, whom she met at the hotel, the protagonist decides to visit a host club to meet a male host she got acquainted with. She thought it would just be a casual night of drinking, singing, and chatting with the male hosts, but she didn’t expect... though it seems like it doesn’t matter now? After all, as long as it feels good, what’s the harm?
"Lya looks most irresistible with her hair flowing loose…"
The protagonist goes by the name "Lya" at the maid café. Akashi, an ardent admirer of the protagonist, frequently finds himself lost in passionate debates with another fan about whether Lya looks even more enchanting with a high ponytail or her long hair cascading down freely. But beneath his cultured exterior, could he be nothing more than a slave to his own desires, drawn to her beauty and charm?
*The above are just a few characters. This work will introduce many more interesting characters, so come and explore them!
The game lasts two years and offers six different itineraries to explore: Research, Convenience Store, Live Streaming, Maid Cafe, Hotel, and Selling Sex. Unlike a traditional simulation game, each of the six itineraries has its own plot and H-events, and the order of execution and decision-making can have multiple effects on the outcome.
In terms of numerical correspondence ending, this game adopts the open-world approach of American RPGs. That is, as much as possible, the player's decisions during the game can be reflected in the endgame, rather than a set of values corresponding to a single game ending.
◇34 CGs, including 19 exquisite SPINE: H dynamic, other HCG also have to produce simple shadow frame animation or vibration effects, hoping to increase the practicality of this work, the total difference of more than 1,000.
◇150,000 words of game text, thick and rich playable content.
◇The heroine has seven outfits to choose from: daily wear, maid, cheongsam, bikini, fallen angel, dress, and nymphomaniac, some of which are customizable, or simply nude.
◇Sexual Transformation, Cthulhu Mythos (Hyperborea)
◇Immersive TRPG-style experience
◇Nearly all of the HCGs have interactive elements, greatly enhancing the practicality and immersion.
◇Game endings: True Endings x1, Good Endings x2, Usual Endings x1 (Boy Status, Girl Status), Middle Endings x3, Bad Endings x1, and a series of Future Talks reflecting the player's choices during the game.
Hello! I’m FoxSister.
I’m one of the early TRPG promoters in Taiwan and have previously taught at the university level.Because I enjoy adult content, I’m now fully focused on creating adult games.I hope everyone who plays my work can have a fun and enjoyable time.
To make this game the best it could be, I worked with professional Japanese voice actors, and the result completely exceeded my expectations. Take the main character, Beryl, for example—she uses several different identities throughout the story: "Lya" the maid, "Rose" the hostess, "FAngel" the livestream influencer, and more. The voice actress actually created different vocal tones for each of these roles, and even the sounds she makes in the more intimate scenes are distinct. I really hope players will buy the game and enjoy this amazing voice acting.
The voice given to Siena is absolutely mesmerizing—it's so intoxicating, it makes you crave the feeling of holding her close, wanting to keep her in your arms forever.
Of course, the other voice actors did a great job too. Honestly, I think the voice work is on par with what you'd expect from professional anime voice acting, and I'm really happy that an indie game can achieve this kind of quality.
I spent an incredibly long time working on the H-scenes and gameplay because I really love H-games and wanted to make sure all the fun elements were in there. It was a tough process—whether it was designing the gameplay, or working with the CG artists and animators, it took a lot of time and energy.
I didn’t neglect the story either. I know that a shallow, mindless plot isn’t going to cut it, and I wanted players to still remember the game fondly years down the road. So I came up with plenty of interesting stories for players to explore. The game is packed with content, and it takes multiple playthroughs to experience everything. This ensures that the game has great replay value.
The most important thing I’ve noticed is that many H-games often stick to a single ending system, where you can only experience one conclusion (or sometimes, there's only one possible ending to begin with). This makes many of the choices throughout the game feel almost meaningless, because in the end, you're bound to one outcome. I’ve designed my game more like a TRPG, where, in addition to exploring the gameplay, the choices you make will directly influence the epilogue. Your decisions will genuinely shape the story and create lasting changes, making every choice feel significant.
Knowing that you’re all busy, I’ve included a one-click unlock feature after completing the game, giving you access to all the HCGs. Almost every HCG has been designed with replayability in mind, so if you're the type of gentleman who loves to indulge, you'll have plenty to savor.
However, before you rush to unlock everything, I strongly recommend playing through to the true ending at least once. Trust me—it’s worth it. The emotional payoff will hit you in a way you won't expect. I’ve been crafting this story for 13 years, and it’s finally come to life in this game. So please, take your time and truly savor every moment of this experience. You won’t regret it.
*Endless Mode will be unlocked in a new playthrough after clearing the True Ending.
If you’re having trouble reaching the True Ending, there are player guides available on the Steam Guide page.
*For the best experience, we recommend exploring and discovering things on your own during your first few playthroughs.
Based on community feedback, the multi-playthrough experience has now been improved.
Audio & text: Japanese
Text only: Traditional Chinese, English, Simplified Chinese
