Hikari no Umi no Apeiria


Hikari no Umi no Apeiria
TitleHikari no Umi no Apeiria
Original title景の海のアペイリア
AliasesThe sea of the landscape Apeiria, 景(ひかり)の海のアペイリア
LengthLong (30 - 50 hours)
DeveloperSilky's Plus & Silky's Plus Dolce
Publishers Silky's Plus
 Moshi Youxi Zhongwenhua Xin...
 Team Curio
Hikari no Umi no Apeiria ~Casablanca ...


"This mail was sent from the future..."

Winter, year 2045. Kirishima Reiichi, who belongs to the AI research club, had finally succeed in developing an artificial intelligence called "Apeiria". Using the functions of Apearia, he made the technology called "VRMMO" -- the virtual world, which is a fusion of magic, science and all those things from the books. However, VRRMMO was a dangerous game with no control. Unfortunately, Apeiria was captured in the virtual world. Now the protagonist and his friends -- his step sister Miu, a rude girl with no friends, his kouhai Mashiro, which wants to be his "slave" and Kuon, a girl with a kind personality, who had chuunibyou syndrome two years ago have to rescue Apeiria from the virtual world. This is story about love, youth and science.

Single Ending 3.0 Secret Identity 3.0 Virtual Reality 2.8 Artificial Intelligence 2.8 Science Fantasy 2.8 One True End 2.7 Imouto-type Heroine 2.5 Perverted Protagonist 2.5 Few Choices 2.5 Mystery 2.2 Time Loop 2.2 Loli Heroine 2.0 Tribadism on Penis 2.0 Sitting Sex 2.0 Standing Sex 2.0 Classic Tsundere Heroine 2.0 Non-blood-related Sister Heroine 2.0 Future Japan 2.0 High Sexual Content 2.0 Battle of Wits 2.0 Gamer Heroine 2.0 Group Sex of One Male and Several Females 2.0 Student Heroine 2.0 Chuunibyou Heroine 2.0 Kyonyuu Heroine 2.0 Multiple Route Mystery 2.0 Kouhai Heroine 2.0 Outdoor Sex 2.0 Infodumping 2.0 Defloration 2.0 Cunnilingus 2.0 Student Club Member Heroine 2.0 ADV 2.0 High School 2.0 Non-blood-related Brother/Sister Incest 2.0 Trapped in Virtual Reality 2.0 Comedy 2.0 Hard Science Fiction 2.0 Oneesan-type Heroine 2.0 AI Heroine 2.0 Male Protagonist 2.0 Student Club President Protagonist 2.0 Twin Blowjob 2.0 High School Student Protagonist 2.0 White Haired Heroine 2.0 Anal Sex 2.0 Boobjob 2.0 Protagonist with Partial Voice Acting 2.0 Clone Heroine 2.0 Bokukko Heroine 2.0 Doggy Style 2.0 Blowjob 2.0 Central Heroine 1.8 Magic 1.8 Winter 1.7 Protagonist with a Face 1.7 Urination Fetish 1.5 Sexual Content 1.5 Masturbation in front of an Audience 1.5 Romance 1.3 Lolicon 1.3 Cowgirl 1.0 Sixty-nine 1.0 Harem Ending 1.0 Ball-cupping 1.0 Adult Breast Feeding 1.0 Sex in Public Places 1.0 Airhead Heroine 1.0 Otaku Heroine 1.0 Spoons 1.0 Bathroom Sex 1.0 Twin Boobjob 1.0 Sexual Blindfold 1.0 Quickie Fix Position 1.0 Branching Plot 0.7 Early Sexual Content 0.7 Parody 0.5


Main characters

MeasurementsHeight: 140cm, Bust-Waist-Hips: 71-49-72cm
Hair, Long, Multiple Tails, Spiky Bangs, White
Eyes, Amber
Body, B Cup, Pale, Short, Slim, Teen
Clothes, Loafers, Mini-dress
Personality, Coodere, Friendly, Kind, Loyal, Refined, Stoic
Role, Artificial Intelligence, Clone, Friend
Engages in (Sexual), Bathroom Sex, Blowjob, Masturbation in front of an Audience, Outdoor Sex, Virgin Sex
Subject of (Sexual), Butterfly, Cunnilingus, Doggy Style, Sitting Sex, Standing Sex
Voiced byAkino Hana


An artificial intelligence whose development succeeds by chance. Appears as a pure innocent child that moves with ego and emotion. Loves her owner Reiichi and will obey his orders.

"Does kindness plus sadness equal to zero?"

Kirishima Miu
Kirishima Miu桐島 三羽 
MeasurementsHeight: 159cm, Bust-Waist-Hips: 86-58-90cm
Hair, Brown, Long, Straight
Eyes, Red
Body, Average Height, D Cup
Clothes, Fingerless Gloves, Garter Belt Stockings, Hairpin, Loafers, School Uniform, Stockings
Items, Handgun, Rifle
Personality, Classic Tsundere, Grumbler, Puffy, Serious, Short-tempered, Smart
Role, Clone, High School Student, Lonely, Step Sister, Younger Sister
Engages in (Sexual), Blowjob, Non-blood-related Incest, Peeing, Virgin Sex
Subject of (Sexual), Butterfly
Voiced byTachibana Mao


Reiichi's younger step sister. Due to her bad attitude, she has no friends and is actually very lonely. Reiichi invited her to the AI research club.

"...Nii-san, you are not only disgusting, but also so stupid, aren't you?"

Side characters

Hair, Bald, Moustache
Body, Adult
Role, Clone
Voiced byNo☆boru


A player in Second, Thinker's assistant.

Ninomae Kuugan
Ninomae Kuugan一 空観 
Hair, Beard
Body, Adult
Clothes, Lab Coat
Personality, Smart, Strange
Role, Coder, Father, Scientist, Widower
Voiced byUeki Tooru


Kuon's father. The developer of VRMMO "Boundary".

Shouen Nanami
Shouen Nanami正円 七海 
MeasurementsHeight: 160cm, Bust-Waist-Hips: 92-53-84cm
Hair, Red
Eyes, Red, Tareme
Body, E+ Cup
Clothes, Nurse's Cap, Plate Armor
Personality, Kind, Mischievous, Pretending
Role, Gamer, Nurse
Engages in (Sexual), Group Sex of One Male and Several Females, Handjob, Outdoor Sex, Tribadism on Penis, Twin Blowjob, Twin Boobjob
Subject of (Sexual), Cowgirl, Missionary, Quickie Fix, Reverse Spitroast
Voiced byAyumi Sarah


A player that the protagonist met at Second. She seems to know the details of the game. Has mature and gentle personality. She works as nurse at Futaba General Hospital.

Hair, Short
Eyes, Green
Clothes, Lab Coat, Mask
Personality, Cold-hearted, Mysterious, Sly
Role, Antagonist, Artificial Intelligence, Clone, Villain
Engages in, Fighting, Murder
Subject of, Death
Voiced byKurashima Jou


A player in Second whose identity is unknown. Owner of a guild called "Kenkyuujo".

<hidden by spoiler settings>There is two Thinker, the first Thinker is AI from Thinker System and the second is AI swampman base on Reiichi