Written by Rastafoo69, edited by Otaku Apologist
Nai’s Training Diary, a hentai simulation game developed by Banana King. Released on January 24, 2020. For PC Windows and Android. Download for Android on DLsite. Full Japanese voice acting. Uncensored genitals. Available in English, Chinese and Japanese.
Nai is an innocent waifu who was beaten up by her Dad. When he gets thrown in prison, it’s up to you to take care of her. Buy her clothing, listen to her stories, and slowly teach her what real love looks like.
STORY
A policeman knocks at your door, hoping you’ll give a home to this abused orphan girl. Her mother passed away and her father is in prison, and the police have nowhere else to turn. You’re a well-trusted journalist with close ties to the police, somehow making you the ideal candidate to be a foster father.
The game starts out very slow. For the first hour it’s completely linear, slowly introducing gameplay features and build up your relationship with Nai. The very first choice of the game is to give head pats or cock. You decide how fast your relationship with Nai will develop.
After five story events, the game opens up. You can send Nai out for three activities per day, each with its own random events. For example, Nai getting bullied by kids at school. This ensures every playthrough is unique, because the story events depend on your choices.
While the core theme is loving an abused girl, the writing has a number of flaws. For example, the game often lacks choices in moments that need them. Someone groped Nai, and all you do is watch. Her boss at work keeps talking about how sexy she is, but you let him continue. There were too many moments where there should have been a choice, which left me frustrated.
While the game is available in three languages, the translations are poorly done. At least in English, bad grammar and weird phrasing makes this a rough experience. I’ve seen fan translators who’ve done a better job than this! And it’s not even a matter of too much dialogue! Conversation topics repeat frequently, which kills player immersion.
If you can look past these flaws there are 20 ending variations. In actuality there’s around ten unique endings, but each has an alternate version if Nai is a slut. Will you get married? Will she become a famous singer? It all depends on which stats you cultivated the most.
GAMEPLAY
Nai’s Training Diary was created in the Unity game engine. You only need a mouse to play. You can skip dialog by pressing the CTRL key, but without a backlog or rewind, you should be very careful using it!
After an hour of prologue and build-up, the game opens up to player influence. You have 100 days to raise Nai before her father is released from prison. During those days you need to help her adapt to normal society through odd jobs.
Nai has five skill stats, each assigned to a unique career. If you make her work at the library, she’ll gain knowledge. If she works as a servant, she’ll gain manners. If she works at a hotel, she’ll learn social skills. Each job has the potential to increase earnings. For example she’ll begin singing on the streets, but eventually sing at the local pub. If any character skill is above 100, Nai will have that job in her ending.
Nai has two mental stats. Stress raises whenever she works and is released when you take her on a date. Favor raises during story events and talking to her at home. Once you reach 100 favor, you can have sex with her. Once you reach 200 favor, you’ll get the marriage ending.
Nai has a lust stat that raises with story events and having sex with you. Lust is lowered by praying at the church. If lust reaches 60, she’ll cheat on you. If it reaches 100, she’ll leave you and become the town whore.
Overall the game is very similar to Ikari Raising Project. You’ll feel encouraged to start a new game and focus on new skills. With so many endings and so much freedom of choice, the game truly is a joy to play.
GRAPHICS
While Nai is drawn in the Japanese anime style, all other characters have a more cartoonish appearance. Sometimes this is horribly jarring, with some characters having soft outlines and eyes far apart. It’s clear that different artists were used frequently. Even worse, many character sprites are carried over from the developer’s previous game, Broke Girl.
Nai is a young beautiful girl who was beaten by her father. She’s often shown with bandages and scars on various parts of her body. At the start of the game, she tends to cover up those marks and always has a fearful look on her face. In the true ending of the game, her scars have largely faded and her eyes are filled with love and hope. Watching her gradual transformation makes this game a truly heartwarming experience.
Nai has eight outfits: A bunny suit, a winter coat, a swimming bikini, and so much more! My favorite is her dancing outfit, its scarlet shine makes her radiate with unmatched beauty.
Cute chibi artworks play during your job. The image gallery can be fully opened from the options menu. There are 43 base CGs, but many of them are similar. In reality there’s about 30 unique scenes.
The fatal flaw of this game is that you cannot hide text boxes. Often times some ass or tits will be hidden by blocks of text. It’s difficult to enjoy these scenes when text boxes block the view. If only this was fixed, I’d be praising the art nonstop.
VOICE ACTING AND SOUND EFFECTS (SFX)
Nai’s Training Diary has full voice acting for the titular character. The problem is, the voice acting does not match the character expressions. I assume the actress was given a script with no direction, because that’s how it sounds. Nai could look completely terrified on-screen, but the delivery is the same monotone voice as always.
The sound effects are limited, but that’s honestly a good thing. Rather than sex scenes bursting with rapid pounding, they’re usually quiet, letting you keep the focus on the voice acting and loving words. While conversations aren’t done well, the voice acting during sex scenes is always erotic! To hear a yelp of pleasure as Nai gets her pussy filled, I almost came in my pants!
MUSIC
There are only a handful of music tracks but they fit the game well. A soft piano melody plays on the main menu as the main theme of the game. I hope you like it, because that track plays through most of the experience. Thankfully, it’s broken up by other tracks that are situational. While there’s a more serious track for story events, there’s a light and relaxing track to match the chibi artwork whenever Nai goes to work. Altogether the music is forgettable.
HENTAI
Nai’s Training Diary has around 30 unique scenes in total. While some scenes will feature a simple nip slip, others are hardcore fucking! You never know what you’re going to get.
Many players have complained about the NTR content in this game. If Nai’s lust rises above 60%, there’s a chance she’ll cheat on you with other guys. Even if you’ve been the perfect boyfriend, she’ll still cheat. Many players felt the cheating happens without warning and is completely unfair.
Another reason players dislike this game, is because they can’t find the normal sex scenes. These are only available after you earn 100 favor with Nai. Most players never do, so the only scenes they find are of Nai fucking strangers.
In reality, netorare is the minority of content. Most scenes are completely normal and focused on you fucking Nai in different clothing and sex positions. From the bunny girl outfit to her bikini at the lake, you can pound Nai in countless ways in countless places.
CONCLUDING WORDS
Nai’s Training Diary is a romance trainer game created by a small indie developer. With 20 endings and 30 scenes, there’s plenty of content to enjoy. Available in 3 languages, for both desktop and mobile devices. If you want to save a cute girl who needs dick and love, this is the perfect adult game for you.
If you enjoyed this game but want a busty girl instead, check out our review of Broke Girl.
Overall
- Graphics
- Gameplay
- Story
- Music
- SFX
- Hentai
