♂ m

Arrested and imprisoned for exhibitionism crime, the young boy is sentenced with 10 years in Tulip Prison where he has fateful encounters with irreplaceable comrades and overcomes many hardships to grow up as a person. He can talk to his penis which has ego of its own.

♀ f 27

Chief warden of the "Sex Crime Section", the second highest hierarchy. She is also called Sister Julia. She believes in religious correction and has the air of a clergywoman. She rarely scolds or punishes, but at the same time, no one knows what she is thinking.

♀ f

Mysterious prisoner who often shows up in the library and coal mine where the protagonist works.

♀ f

Prisoner in Serious Crime Section. She is representative of prisoners and the leader of a huge yakuza organization in the outside world.

♀ f

Prisoner of Obscene Section. Her crime is voyeurism using flying drones.

♀ f

She is the chief warden of the "obscenity section" where the protagonist is imprisoned. She is a tall, beautiful blonde woman whose nickname is "Sofurin"(Ethics Organization of Computer Software). She respects discipline and orders absolute obedience to what she says, and has no mercy for those who ... read more

She is the chief warden of the "obscenity section" where the protagonist is imprisoned. She is a tall, beautiful blonde woman whose nickname is "Sofurin"(Ethics Organization of Computer Software). She respects discipline and orders absolute obedience to what she says, and has no mercy for those who violate her orders. At the same time, she considers all prisoners to be scum and treats them with the eyes of a dead fish.

♀ f

She is the chief warden of the "Serious Crime Section", the most hierarchical of the guards. Known as the "Queen Bee" to those around her, she practically holds the reigns of the prison. She has no hesitation in tormenting others, and has a strong sense of cruelty.

Shuuichirou's only friend. Shuuichirou commits obscenity in order to prove his existence to the world.

♂ m

♀ f

A female prisoner with a calm atmosphere. An unusually kind woman with whom the protagonist first opened up. Her nickname is "Guru".

♀ f 32

Only doctor of Tulip Prison. She treats all prisoners equally with care and kindness.

♂ m

Prisoner who works as information provider and illegal goods procurement personnel behind the scene for prisoners with money.

♀ f

She is a model prisoner in the "obscenity cell". The guards like her because she is a sycophant. She is a cowardly character who is willing to give up others and lie in order to save her life. Her nickname is "Kusomori"(Shitty Mori).

♀ f 26

Protagonist's older sister who treats him kindly even after he becomes exhibitionist. She has a weak body since birth.

♀ f

A bright woman who serves as the director of Tulip Prison, she is strict against hentai behavior, but she also has a caring side when it comes to the people she likes.

♀ f

Leader of the Special Guard. She is loyal to Chief Warden Yuugao. Natsumi comes from Seiran Island and was a member of the SS 1st Unit where she received most of her training.

♂ m

Member of Taeka's gang and yakuza organization. He bullies the protagonist at first but later becomes intimate with him.

♀ f

Member of the Special Guard.

♂ m

♀ f

♀ f

A prisoner with a fetish for children's indoor shoes.

♀ f 24

General prison guard of Obscene Section under Sofia. She has talent of twisting everything into hentai relation.

♀ f

♀ f