Steam] Kunoichi, Succubus, and Puzzle! A little (?) Erotic PC Games

Dear Akiba Research Institute users, how are you doing? I'm Nero Hyakkabe, a writer who buys too many games. I bought 4 out of the 4 games on sale at the Level-5 Switch 1,000 yen sale the other day. More games in my stack, yay!


Now, this may seem sudden, but why do human beings exist in this world? No, I am not trying to talk about philosophy or spirituality. I wanted to tell you something biological, that is, that humans, in other words, human beings, exist in this world because some kind of "echi-thing" occurred somewhere without fail. So, with this strange preamble, I would like to introduce you to some slightly (maybe even rather) echo-y games that you can play on Steam. If you are not good at this, or if you are underage, please turn right now!　And if you like it, welcome!


1. cheerful and cute bum girl, Kunoichi, and her cheerful and erotic life living together! NinNinDays


  • NinNinDays" (create, iMel Inc.)
  • On sale August 9, 2019
  • Price: 1,280 yen (as of March 18, 2020)
  • (C) 2019 qureate

Kunoichi. It is a term for a female ninja. It is all too well known that the word "kunoichi" was created from the Chinese character for "woman" that when broken apart becomes "kunoichi," but the word "kunoichi" was originally used as a cloak to refer to women, and it did not mean female ninja. Furthermore, there is no historical record of the existence of female ninja. However, let me dare to say this. Even if they did not exist historically, the romance of the "kunoichi" is real!

So, I would like to introduce "NinNinDays," a game full of romance in which you can live together with a Kunoichi girl in a slightly erotic way. For your information, I will write "Kunoichi" in this article in accordance with the description on the official website.



The main character is a young freelance worker who lives his daily life as he pleases and feels somewhat inadequate. By the way, he lives in Akihabara. It seems like fate that we introduce him here at Akiba Research Institute, doesn't it? ......


The story begins when the protagonist, on his way home from his part-time job, meets a girl named Sumire, a Kunoichi, who is lying on the side of the road. By the way, the reason why she was lying down is not because she was attacked by enemy ninjas....... It was hunger. She is a hungry ninja. At this point, it is already quite cute!



The main character's luck began when he gave Sumire a steamed meat bun that he had just bought at a convenience store,......, but it was not the end of his luck, but the beginning of his fortune.


Sumire, who insists that her training is to serve the first person to whom she is indebted, calls the protagonist "Lord (aruji-sama)" and goes home with him as if she were a forced wife. Thus, the exciting life together begins. By the way, I can swear that I have never been called "Lord" in my real life!　I wish I could!



This is a romance adventure game in which you read the text as you go along.
The easy-to-read, light tempo of the text, cheerful story with a comedic touch, and pleasant music that evokes a good old gal game-like atmosphere make it very easy to play, and anyone can get into the game smoothly.


The greatest feature of this work is Sumire's standing picture, which moves smoothly using "E-mote".
I regret that I can only show you a still image of Sumire, but she moves around very smoothly during the game. And I won't say where, but she is swaying a lot. Again, I regret that I can only show you still images.


Anyway, the sight of Sumire, who moves nimbly while changing her facial expressions, never gets old and is a great motivator for enjoying the game.



I believe that the charm of the heroine is 90% or more of the key to a romance adventure game, and Sumire, the heroine of this game, is a very attractive character, not to mention her cute illustrations and voice. Sumire's innocent and slightly naive character, who has spent her life training as a ninja in the modern age, and her bright, positive, and energetic smile will surely soothe you.


Of course, there will be a lot of "echi-something" going on in the changing room and in the bath, so don't worry if you like that!


　In addition, a fascinating "R18 Patch" is available on the official website. If you do this, you will be able to see Sumire's penis go into action, but that's all I can tell you. Please see the rest with your own eyes. Of course, no one under the age of 18 is allowed!



By the way, Sumire is a "skilled ninja" who can throw shuriken brilliantly and use both katon (fire fugue) and suiton (water fugue) at will, but she is not very good with dogs. When I thought of a character who is a houseguest who is not good with dogs, "Obake no Q-uro" immediately came to mind. Come to think of it, there was also a famous ninja in residence in the same artist's works, wasn't there? In that case, a smiling, black-skinned salesman-like girl would give you mysterious products and abilities, and then, boom!　I wonder if it would be possible to have an echigo game like that. ...... No, that's just plain scary. ......


Official site" is here.

2. 2! Now you can live together with a succubus! Torabudeizu

  • Torabudeizu" (qureate, iMel Inc.)
  • February 14, 2020 release date
  • Price: 1,280 yen (as of March 18, 2020)
  • (C) 2020 qureate

Succubus. It is translated as "dream demon" or "lewd demon" in Japanese. It is said to be a female demon who shows lewd dreams to men and has relations with them. It often appears as a motif in old legends and works of art. Famously, Auguste Rodin, a French sculptor well known for "The Thinker," created a statue of a succubus in a cat-like posture with its mouth open languidly.
In fact, the work "Torabudeizu" is a work in which you can live together with a succubus that has fascinated people for a long time, and honestly, it would be unnatural if it did not turn out to be so erotic.



This game is developed by the same company as "NinNinDays" introduced earlier, and like "NinNinDays," it is a game with a sense of stability. The protagonist of this work is a young man who spends his days working part-time. His parents want him to return to his parents' home to take over the family business, and they have even arranged a blind date for him, but he is not very enthusiastic about it. By the way, he lives in Akihabara. We can't help but introduce him here at Akiba Research Institute (......).
The story begins when he is attacked, or nearly attacked, in his sleep by Lobelia, a succubus girl who suddenly appears.



Lobelia, in order to steal the male desire power called techno-force, tries to attack the protagonist in his sleep, but she is not very good with men. Even when she tries to attack him, she has a hard time taking the plunge. In accordance with the iron law of the Succubus tribe that a Succubus cannot return to the demon world and possess another man until she has collected the techno-force of the man she has targeted, Lobelia offers to stay with the protagonist. Thus begins the exciting, slightly erotic cohabitation between the hero and the succubus. The author's impression? I like it! That's all I can say.



Like "NinNinDays," this is a romance adventure game in which you read the text. And in this game, too, "E-mote" makes Lobelia's standing picture move smoothly. And, although I won't say where, the pictures are shaking. I think it would be a good idea to make this a standard feature in all games in the world.



The major difference between this game and "NinNinDays" is that the heroine is a succubus. While Kunoichi have their own unique personalities and charms, Succubus have a strong connection to the erotic, and the game will make you feel nervous as you anticipate the erotic development of the story. In the first place, Lobelia's objective is to squeeze the techno-force out of the main character! However, Lobelia is a girl who is not good at men or echi-chi. As the story progresses, she and the main character slowly learn what love is and what sex is, and as they gradually get to know each other, you will forget that this is a sexually explicit game and feel a warm, gentle feeling.
So, "Torabudeizu" has a different charm from "NinNinDays.



Now, here is some information for those who like this game. I won't say much more. Please see for yourself. And I'll say it again, no one under the age of 18 is allowed!　Wait with bated breath and shudder for my 18th birthday!　That's a promise I made to Nero Hyakkabe!

Click here to visit Steam.

3. an exhilarating 3-match puzzle game with a novel "clothes-tearing system. Mirror


  • Mirror" (KAGAMI WORKs)
  • Released on April 19, 2018
  • Price: 205 yen (as of March 18, 2020)
  • (C) 2018 KAGAMI WORKs

Now that we have introduced two text-type romance adventures, let's change gears and introduce another genre of echi-chi game.



This title, "Mirror," is a puzzle game with a very erotic feel. The game is a fusion of a "Candy Crush"-type 3-match puzzle game and a "Puzzle Dora"-like battle system, which is easy to imagine.
However, it is more than just puzzles. The game alternates between an adventure part with a story and a puzzle part. The story is in an omnibus format. You will enjoy short stories featuring a variety of girls as heroines, such as a shrine maiden, an orc warrior, a dragon maid, and a mysterious warlord-like girl, as you battle with them in puzzles.



The rules of the game are simple and clear: connect and erase three or more gems of the same type to inflict damage on your opponent, and you win if your opponent's HP is reduced to zero, while you lose if your HP is reduced to zero. Despite its orthodox content, the game as a whole has a good feel, and you can enjoy a pleasant sense of exhilaration when a chain of puzzles is triggered with light sounds and effects.
There is also an element of growth in the game, as you level up your abilities with the points you earn by clearing puzzles and unlocking new skills and items. In other words, if you don't grow your skills, you will usually get stuck in the game. It is a game that is so challenging that you can enjoy it as a pure puzzle game without feeling that it is compromised by the fact that it is an echi-game and the game part is just so-so .......



I have reviewed ...... so far in a normal way, but we must not forget. This article is a special feature on "echi-nasty games. For those of you who like them, here you go. Let me introduce a point worth mentioning about this game.
The name of it is the "Clothes Breaking System. This is a bold and innovative system in which a certain amount of combo damage is dealt in a chain of attacks, causing the girl's clothes to tear. There have been "undressing rock-paper-scissors (yakyuken)" and "undressing mahjong" in the past, but this is probably the first and the best "undressing 3-match puzzle" (although technically, only the clothes are torn, not undressed). Incidentally, the "Clothes Tearing System" can be turned on or off by option.



Now, here's a little information for those of you who like to know: each girl has a "training part" as a reward for her efforts. This part is really a very naughty something part as the name "training" suggests, so if you are interested, please use your own puzzle power to capture the girls!
By the way, I love 3-match puzzles with pleasant chains, so I also bought the Switch port, which has less echigo-y elements (a sudden appeal to health).



Click here for Steam

Conclusion: Thinking of "Hentai," which is bustling with activity on Steam.


So, I introduced three recommended games.


Naturally, erotic games are not released on home consoles, and the PC is the main market, but with the establishment of the Steam platform, the market has recently been flourishing.
As proof of this, type "Hentai" into the Steam search window and you will see a lineup of Japanese anime-style games. I am reminded that the word "Hentai" has really become an international term, but that aside, let's enjoy echi-chi games in a healthy way, and in moderation!


Author：Nero Hyakkabe
Freelance writer who buys too many games. I currently have more than 300 games in my stack. I am also a novelist. Author of "Goaken Unrated Edition" (Kodansha) and "My Mother's Lie" (in "Malicious Kwaidan") (Takeshobo).

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