Amatarasu Riddle Star


TitleAmatarasu Riddle Star
Original titleあまたらすリドルスター
LengthMedium (10 - 30 hours)
Publishersseal-QUALIA & Softhouse-Seal & Moe App & Hublots Inc
Baijingmu Xueyuan Hanhuazu
Martro122 - VNS
LinksWikipedia (ja), Wikidata, VNStat
Shops» JP¥ 7124 @ DLsite (jpn)
» US$ 39.95 @ MangaGamer


Doumoto Takaya was bored.

One evening, he had taken up his childhood friend’s invitation to have a late-night picnic. He accepted, if only to subdue his boredom, and was encouraged to wish upon the shooting stars that were a common spectacle in the town of Hoshigino. During their picnic, a shooting star whisked across the sky and he hurriedly wished for “something fun and wondrous” to occur in his seemingly boring life.

To their surprise, stars began to trickle down from the sky and quickly turned into a full-fledged meteor shower. Rather than disappearing, the shooting stars seemed to have taken shape, aimed at Hoshigino, and enveloped it in a warm, bright light. Once the light dissipated, a single shooting star remained and barreled across the sky before ramming straight into the empty, nearby hill.

From the cloud of dust, Takaya and his chilldhood friend, Yua, discovered a rabbit-eared girl with white hair running straight for the town. Yua quickly chased after her, but rather than finding the rabbit-eared girl, they found something beyond their wildest imaginations...

[From MangaGamer]

Only Virgin Heroines 3.0 Long Sexual Scenes 3.0 ReunionS 3.0 Bookworm Protagonist 3.0 Multiple Endings 3.0 Only Good Endings 3.0 Big Breast Sizes Heroine 2.5 Student Protagonist 2.3 Student Heroine 2.3 Male Protagonist 2.3 Protagonist's Childhood Friend as a Heroine 2.3 ADV 2.3 Rabbitgirl Heroine 2.0 School Festival 2.0 Bookworm Heroine 2.0 Loli Heroine 2.0 Foolish Friend 2.0 Deredere Heroine 2.0 Alternate DimensionsS 2.0 Shy Heroine 2.0 Princess Heroine 2.0 Western-style Castle 2.0 Heroine with Zettai Ryouiki 2.0 Heroine with Heterochromia 2.0 Psychological TraumaS 2.0 Sexual Content 2.0 Heroine with Tights 2.0 Bokukko Heroine 2.0 No Common Sense Heroine 2.0 Pretending HeroineS 2.0 Twin Tail Heroine 2.0 Sixty-nine 2.0 Albino Heroine 2.0 Maid Support Character 2.0 Heroine with Intake Hairstyle 2.0 Balls Sucking 2.0 More Than Seven Endings 2.0 SacrificeS 2.0 Dream 2.0 Female Ejaculation 2.0 Heroine with Expressive Ahoge 2.0 Heroine with a Fang 2.0 Outdoor Sex 2.0 Standing Sex 2.0 Discreet Sex 2.0 DisappearanceS 2.0 Quickie Fix Position 2.0 Single Boobjob 2.0 Single Footjob 2.0 Single Handjob 2.0 Single Blowjob 2.0 Vaginal Fingering 2.0 Straight Lolicon 2.0 Athletics Festival 2.0 Protagonist's Kouhai as a Heroine 2.0 Food Discussions 2.0 Other Perspectives 2.0 Flashback 2.0 Defloration 2.0 More Than Seven Heroines 2.0 Oppai Loli Heroine 1.7 Unlockable Routes 1.7 Heroine with Ahoge 1.7 Transfer Student Heroine 1.7 Naked Sprites 1.7 Protagonist with a Face 1.5 Existential Crisis 1.5 Super Deformed CG's 1.5 Footjob 1.5 Cowgirl 1.0 Reverse Cowgirl 1.0 Missionary Position 1.0 Central Heroine 1.0 Blowjob 1.0 Handjob 1.0 Narrating Others' Thoughts 1.0 Bukkake 1.0 Cunnilingus 1.0 Sexual Devices 1.0 Bathroom Sex 1.0 Boobjob 1.0 Multiple Route Mystery 1.0 Fingering 1.0 Doggy Style 1.0 Bondage 1.0 White Haired Heroine 0.3 Lolicon 0.2

Hide spoilersShow minor spoilersSpoil me! | Show sexual traits


Main characters

MeasurementsHeight: 159cm, Bust-Waist-Hips: 90-57-86cm, G cup
Birthday8 February
HairBlue, Intake, Kemonomimi, Shoulder-length, Sidehair
EyesAmber, Blue, Heterochromia
BodyAverage Height, Fang, Huge Breasts, Pale, Slim, Teen
ClothesBell, Boots, Bra, Clothing with Ribbons, Cuffs, Decorative Belt, Dress, Headband, Ribbon Hair Accessory, School Uniform, Shimapan, Sun Hat, Thigh-high Stockings, Veil
PersonalityCarefree, Friendly, Kind, Mysterious, Sleepyhead, Sweets Lover, Watashi
RoleHigh School Student, Transfer Student
Engages inTeasing
Voiced bySakakibara Yui


The first time Takaya met Ai was when she suddenly came to his house and claimed to be the shooting star that fell to their school. Ai has the “onee-chan” personality, one that is very caring for someone younger; usually a younger brother. She refers to herself as Takaya’s “older sister” despite Takaya not having anyone who could remotely have that role. She is also always smiling, but definitely hiding something.

[From Eroge Review & Getchu]

Arisu Yua有栖 結愛
MeasurementsHeight: 154cm, Bust-Waist-Hips: 88-57-84cm, E cup
Birthday20 December
HairAhoge, Black, Sidehair, V Bangs, Waist Length+
EyesBlue, Tareme
BodyAverage Height, Pale, Slim, Teen
ClothesCoat, Jacket, Miniskirt, Necklace, Pajamas, Ribbon Hair Tie, School Uniform, Skirt, Sports Uniform, Sweater, Thigh-high Stockings
PersonalityDeredere, Immature, Kind, Watashi
RoleChildhood Friend, Full Sister, High School Student, Popular, Younger Sister
Engages inAthletics, Cleaning, Cooking
Voiced byToono Soyogi


Yua is the childhood friend of Takaya. It’s pretty obvious that this girl is already infatuated to the protagonist from the very beginning of the title; shown by her constant approaches despite the fact Takaya seems to find it annoying. Excellent at cooking and housework, Yua is ranked #1 in their school of the “Most wanted as a bride”. This kind of character is the type that makes other male students cry in hatred and frustration.

Despite her continuous approaches, Takaya originally sees Yua as nothing more than a childhood friend, as her fairytales were quite irrational and, perhaps to the cynical protagonist, annoying. Despite this, Takaya seems to enjoy Yua’s company because she’s the only real friend that he has… That is until the incident.

[From Eroge Review]

Hatta Madori八多 真鳥
MeasurementsHeight: 147cm, Bust-Waist-Hips: 88-59-84cm, F cup
Birthday6 October
HairBrown, Intake, Long, Sidehair, Spiky Bangs, Wavy
EyesBlue, Central Heterochromia, Cyan
BodyPale, Short, Slim, Teen
ClothesHair Ribbon, Knee-high Socks, Naked Apron, School Uniform, Shirt, Top Hat
PersonalityBoku, Deredere, Energetic, Mischievous, Pervert, Talkative
RoleHigh School Student, Kouhai, Rival
Engages inCooking, Flirting, Teasing
Voiced byAyukawa Miina


Madori is Takaya's kouhai. While being small, this girl has a bust size of 88cm, and an F cup. Woo~! She often uses this trait to “seduce” Takaya for fun, as well as to ignore a topic she doesn’t want to talk about.

<hidden by spoiler settings>

[From Eroge Review]

Kokoro Judithココロ ユーディット
MeasurementsHeight: 142cm, Bust-Waist-Hips: 71-54-78cm, A cup
Birthday10 August
HairOdango, Pink, Short, Sidehair, Straight, Twin Tails, V Bangs, Waist Length+
BodyKid, Pale, Short, Slim, Small Breasts
ClothesBoots, Crown, Dress, Evening Gloves, Hair Tie, High Heeled Shoes, Necklace, Pantyhose, Pendant Necklace, Ribbon Hair Tie, School Uniform
PersonalityArrogant, Hardworker, Ignorant, Modern Tsundere, Nature Lover, Shy, Watashi
RoleHigh School Student, Lonely, Ojousama, Princess, Principal, Student Council President
Engages inDancing
Subject ofBridal Carry
Voiced byYukimiya Anzu


The girl who emerged from the castle that the school was turned into after the meteor show. Kokoro is always accompanied by a maid named “Iru”, who can launch her head at anyone; this is done first at Takaya, but used often as a running gag against Adam when he steps out of his bounds.

It is revealed very early that Kokoro is a princess of a kingdom. It is not specified which kingdom she came from, or what kind of authority she holds. Despite this, after her house (castle) lands on the school, effectively replacing it, Kokoro takes the role of the school principal. This replaces the old principal, who happily retires into gardening strange flowers he seems to be able to talk to.

Kokoro may be a princess, but she’s very shy when it comes to Takaya, which suggests that the two may have met before. Her first words to the class is an arrogant statement that she “…will take anyone to become my servant!!”, but this was actually her plea to ask for friends; she simply didn’t know how to ask for friends directly.

[From Eroge Review]

Yukishiro Miu雪白 みう
MeasurementsHeight: 157cm, Bust-Waist-Hips: 84-59-85cm, C cup
Birthday22 May
HairAhoge, Sidehair, Spiky Bangs, Twin Tails, Waist Length+, White
BodyAverage Height, Kemonomimi, Pale, Slim, Teen
ClothesBlouse, Bracelet, Cardigan, Collar, Dress, Glasses, Hair Tie, Headband, Miniskirt, Necklace, Off-The-Shoulder Shirt, Pantyhose, School Uniform, Tank Top, Torn Pantyhose (damaged), T-shirt
PersonalityBookworm, Honest, Mysterious, Reserved, Stoic, Strange, Stutter, Timid, Watashi
RoleClassmate, High School Student, Rabbit, Transfer Student
Engages inCooking, Reading
Subject ofNymphomania
Voiced byOgura Yui


Miu is a mysterious girl who appeared on the day the shooting star hit the school. The first encounter with this character is when her house drops (along with a loud crash presumed to be a meteor), in the forest near the hill where the two childhood friend is stargazing at. She mutters the words “It’s definitely here…” and disappears, and soon reappears at the school - to meet the protagonist for the second time.

Miu’s personality is introverted and shy, but when it comes to sexuality, her identity as a “rabbit” is corresponding to the common statement “reproducing like rabbits”. Whenever she panics, her rabbit ears come out.

[From Eroge Review]

Side characters

Arisu Rina有栖 梨奈
MeasurementsHeight: 162cm, Bust-Waist-Hips: 87-57-85cm, F cup
Birthday18 April
HairAnkle Length, Black
BodyAverage Height, Pale, Slim, Young-adult
ClothesHair Ribbon, Necklace, Pantyhose, Skirt
PersonalityBL Fan, Carefree, Kind, Otaku
RoleFamous, Full Sister, Older Sister, Writer
Engages inInvestigation, Teasing
Voiced byMisonoo Mei


Yua's older sister who is a writer. She is often running around the town looking for interviews, mostly due to the strange events (the shooting star and the school being replaced) in the city. While she is very nice, Rina is actually a very huge fujoshi, and loves to pair Takaya up with Adam and sees everything around her through her "BL Vision", which is why Takaya has a hard time and trouble corresponding.

MeasurementsHeight: 155cm, Bust-Waist-Hips: 84-59-86cm, B cup
Birthday11 November
HairCurtained, Green, Parted to Side, Red, Short, Sidehair, Spiky Bangs
BodyAverage Height, Pale, Slim, Teen, Young-adult
ClothesMaid's Dress, Maid's Headdress, String Ribbon Tie, Thigh-high Stockings
PersonalityLoyal, Obedient, Stoic, Sweets Lover
RoleMaid, Robot
Engages inDomestic Violence, Sadism
Voiced byMoka Choko


Kokoro's loyal android maid who is always following her. She has a habit of launching her head at people who annoy her, especially Adam.

Tooido Melody十伊堂 メロディー
MeasurementsHeight: 149cm, Bust-Waist-Hips: 86-57-83cm, E cup
Birthday9 June
HairAhoge, Blond, Shoulder-length
BodyPale, Short, Slim, Teen
ClothesHair Flower, Pantyhose, School Uniform, Sport Bloomers
Voiced byYumeno Narumi