ZENGAKU! ~Zenra Toukou Shuukan Tokubetsu Taisaku Gasshuku~


TitleZENGAKU! ~Zenra Toukou Shuukan Tokubetsu Taisaku Gasshuku~
Original titleぜんがく!~全裸登校週間特別対策合宿~
AliasesZENGAKU! ~Special Training Camp for a Naked Week~
LengthShort (2 - 10 hours)
Publishers 4H
Same series
Zenra Toukou Training
Shops» JP¥ 1980 @ DLsite (jpn)


Naked Week. Just as the name implies,
that is a week which you must head to school... naked.
A traditional custom of a certain Japanese academy.
However, the freshgrads that have only just enrolled
cannot handle such a high-level of exhibition straight away...
They must first head of to a special training camp so that
they may prepare themselves for the humility of nakedness.

That is, the Special Training Camp for a Naked Week regime.
Also known as... ZENGAKU!!

You participate in training camp with the girl that you adore!
But what awaits you at the camp is...
a full on training regime of humiliation and disgrace!?

[From DLsite English]


Masumi Chris
Masumi Chris真澄クリス 
Hair, Brown, Short
Eyes, Brown
Body, Large Penis, Pale, Slim, Teen
Clothes, Naked, Naked in Front of an Audience, Necktie
Personality, Brave, Effeminate, Kind, Loyal, Obedient
Role, Middle School Student
Engages in (Sexual), Doggy Style, Group Sex, Masturbation, Masturbation in front of an Audience, Missionary, Sex in Front of an Audience, Vaginal Fingering, Virgin Sex
Subject of (Sexual), Blowjob, Group (4+) Blowjob, Peeing, Twin Blowjob


The primary protagonist. He passed the examination as a supplementary student. He's just grateful to be given a chance to go to an elite school. Fell in love with Alice the first day of school and is so excited to be her partner he's even willing to put up with her mean hidden personality.

He's so effeminate it's a shock to everyone that he has a huge penis, the largest of anyone in his class.

Main character

Koori Sana
Koori Sana古織紗奈 
Hair, Long, Pink, Twin Tails
Eyes, Pink
Body, Pale, Slim, Teen
Clothes, Cheerleading Uniform, Miniskirt, Naked, Naked Apron, Naked in Front of an Audience, No Panties, Ribbon Tie, School Uniform, Sport Bloomers, Sports Uniform
Personality, Friendly, Low Self-esteem
Role, Cheerleader, Exhibitionist, Middle School Student, Poor
Engages in (Sexual), Boobjob, Group Sex, Peeing, Peeing on Others, Public Masturbation, Twin Blowjob, Virgin Sex
Subject of (Sexual), Missionary
Releases> Main character - r57006:ZENGAKU! Sana Append
> Side character - All other releases
Voiced byNogami Natsuki


Chris's second partner. She was teamed up with him because there was an odd number of girls to boys even though he was already partners with Alice.

Sana hopes to become a doctor someday but can't afford a good high school to attend so she becomes a scholarship student at Nihon Daiichi Gakuen. She puts up with training for naked week knowing it's her only hope of becoming a doctor but she's extremely embarrassed by it. She has the largest breasts in her class which just brings her embarrassment.

Side characters

Asahina Akari
Asahina Akari朝日奈 あかり 
Hair, Long, Ponytail, Red
Eyes, Violet
Clothes, Blazer, Miniskirt, Naked, Naked in Front of an Audience, Ribbon Tie, School Uniform
Personality, Cheerful, Kind
Role, Middle School Student
Engages in (Sexual), Blowjob


Asahina is a third year middle school student at Nihon Daiichi Academy and a classmate of Shizuku and Akira. She tells Shizuku that she has done naked week 9 times already because she started in kindergarten so she is used to boys staring at her during the week and being naked in front of crowds doesn't bother her.

Because Shizuku peed herself and passed out from embarrassment during her public speech while naked Akari is often assigned to go with her to public events so that Shizuku isn't alone.

No image uploaded yet

Shiba Youhei芝 洋平 
Hair, Black
Eyes, Black
Clothes, Naked, Necktie, School Uniform
Role, Exhibitionist, Middle School Student
Subject of (Sexual), Forced Public Nudity


Chris's friend and Kanon's partner. He's excited by naked week and enjoys both the chance to see naked girls and being naked himself.

Toujou Kanon
Toujou Kanon東条花音 
Hair, Black, Shoulder-length
Eyes, Violet
Clothes, Miniskirt, Naked, Naked in Front of an Audience, Ribbon Hair Accessory, Ribbon Tie, School Uniform
Personality, Shy
Role, Middle School Student
Engages in (Sexual), Blowjob, Group (4+) Blowjob, Sex in Front of an Audience
Voiced bySuzuki Ryou (Sana Append only)


Kanon is a very shy girl who's partnered with Yuuhei during naked week training. She's impressed with how kind and considerate Chris is to his partners Alice and Sana. Her biggest fear is being raped during naked week and hopes Chris can help rescue her when she's in need.

She is voiced only in the Sana Append where she takes the role of sub-heroine to Sana and Alice.

Makes an appearance

Hisahara Shizuku
Hisahara Shizuku檜生原 雫 
Hair, Black, Long
Eyes, Brown
Clothes, Bandages, Bikini, Bow Tie, Bra, Kemonomimi Headband, Naked, Naked in Front of an Audience, No Panties, Panties, School Uniform, Towel, Trench Coat
Personality, Modern Tsundere, Naive, Shy
Role, Exhibitionist, Middle School Student, Model, Transfer Student
Subject of, Sexual Harassment
Engages in (Sexual), Masturbation
Voiced byNogami Natsuki


Hisahara is a student who always achieve very high scores. She knows the protagonist when he delivers her homework as she was sick. They became friends, then soon afterwards move to a prestigious high school in Tokyo because their school was damaged by fire. Here, however, they are required to attend training for an unique program called "naked school". Since then, Hisahara has to engage in so many embarrassing situations. The protagonist sometimes helps her, sometimes is the one who create these situations (following teacher's instruction). The training brought them close together, and changed their relationship forever