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Riddle Joker

TitleRiddle Joker
LengthLong (30 - 50 hours)
Yayoitsuki Hanhuazu & Moshi Youxi Zhongwenhua Xingqu Xiaozu & Hikari Field
RG Smoking Room
LinksWikipedia (ja), Wikidata, VNStat


People used to call such unfathomable abilities "superpowers".
Through the discovery of a certain particle during the end of the 20th century, however, the mystery surrounding these powers was solved, with them and their users now being referred to as "Astral abilities" and "Astral users", repsectively.

Arihara Satoru is an ordinary person living in this extraordinary world.

However, that is but a facade.
Hidden beneath the surface, Arihara Satoru is actually an Astral user working as an agent under a secret organization!

His newest mission:

"Infiltrate this school geared towards Astral users as one of its students!"

Along with his little sister, Arihara Nanami, he succeeds in the infiltration and blends in with the students there without a hitch, building a rapport with fellow classmates Mitsukasa Ayase and Nijouin Hazuki as well as upperclassman Shikibe Mayu along the way.

Having not drawn even the tiniest bit of suspicion, his mission continues according to plan.

--Or so he had hoped. Due to an unforeseen event, his true identity was revealed to Mitsukasa Ayase!
But the revelations didn't stop there; Ayase's own big secret was also revealed:

What do you know! Her chest was padded!

The two now held each other's unspeakable secrets within them.
And with that one encounter, their fate would be forever changed--

Hide spoilersShow minor spoilersSpoil me! | Show sexual traits


Arihara Satoru在原 暁
Aliases西行 暁, Nishiyuki Satoru
HairBlack, Eye Covering, Straight
RoleChildhood Friend, Classmate, Eleventh Grader, High School Student, Kouhai, Non-blood-related Brother, Non-blood-related Son, Older Brother, Secret Identity, Senpai, Spy, Superhuman, Transfer Student
Engages inInvisibility


Satoru is an orphan who was adopted by Arihara Ryunosuke back when he was still a kid. Nanami, who was likewise adopted by their dad, is his non-blood-related sister.

He currently lives as a normal school student, but in truth, he works for his dad's organization as a secret agent.

[From NekoNyan]

Main characters

Arihara Nanami在原 七海
HairBlond, Sidehair, Spiky Bangs, Straight, Tiny Braid, Twin Tails, V Bangs, Waist Length+
EyesAmber, Red
BodyPale, Teen
ClothesAnkle Socks, Blazer, Bow Tie, Capelet, Gloves, Hat, Hoodie, Miniskirt, Pantyhose, Pleated Skirt, Ribbon Hair Tie, School Uniform, Short Shorts, Thigh-high Stockings
PersonalityChuunibyou, Mature, Otaku, Shy, Watashi
RoleClassmate, Healer, Kouhai, Non-blood-related Daughter, Non-blood-related Sister, Secret Identity, Spy, Tenth Grader, Transfer Student, Younger Sister
Voiced byKusuhara Yui


Nanami is Satoru's little sister, however, they hold no blood relation.

She's a sweet girl who excels at every aspect of housework. In terms of personality, she's rather placid and subdued. She tends to be shy and reserved when first meeting someone, but once she warms up to a person, she can be rather friendly.

In the organization, Nanami acts as Satoru's partner, providing him back-up during missions. Despite the fact that she frequently bashes him for his rash decisions, she loves him dearly and does her best to look after him. Little known by others, she also has a bit of a chuunibyou side to her.

[From NekoNyan]

Mitsukasa Ayase三司 あやせ
MeasurementsA cup
HairBraided Headband, Pink, Spiky Bangs, Straight, Waist Length+
BodyPale, Teen
ClothesBeret, Bikini, Bikini Skirt, Blazer, Breast-Pads, High Heeled Boots, Miniskirt, Necktie, Pantyhose, Pleated Skirt, School Uniform
PersonalityCheerful, Grumbler, Hardworker, Nature Lover, Outgoing, Pretending, Short-tempered, Watashi
RoleClassmate, Eleventh Grader, Kouhai, Psychic, Senpai, Student Council President
Voiced bySawasawa Sawa


Ayase is one of Satoru's classmates.

She's cheerful, responsible, and is loved and admired by everyone. After she was interviewed as the result of a certain newsworthy incident, she became somewhat of an internet sensation as a result of her looks.

Her bust size is E--that's what her bio says, at least, but that's a size she can only reach through extensive padding. Her breasts are truthfully a very modest size, so E-cups are nothing more than a pipe dream for her.

Her personality, like her breasts, is also fabricated. The real Mitsukasa Ayase is a bit lazy, moody, and prefers shutting herself in her room over hanging out with others.

[From NekoNyan]

Nijouin Hazuki二条院 羽月
HairBlack, Sidehair, Spiky Bangs, V Bangs, Waist Length+
BodyPale, Teen
ClothesBlazer, Headband, Miniskirt, Necktie, Pleated Skirt, School Uniform, Short Shorts, Spats, Sweater, Thigh-high Stockings, Vest
PersonalityBlunt, Closet Pervert, Disciplinarian, Proactive, Serious, Watashi
RoleClassmate, Daughter, Dormitory Manager, Eleventh Grader, Kouhai, Senpai, Wealthy
Subject ofBridal Carry
Voiced byHaruka Sora


Hazuki is another classmate of Satoru's and she also happens to be the manager of the dorm he lives in.

Her personality is best described as rigid. She's very duty-bound, and highly values rules and proper behavior. That, combined with the fact that she's the dorm manager, means that she often has to scold students for things, but they don't hold that against her.

She's very well-respected and well-loved by her peers. She's also a very big fan of historical dramas and owns a respectable DVD collection of them.

[From NekoNyan]

Shikibe Mayu式部 茉優
HairGreen, Long, Side Tail, Spiky Bangs, V Bangs, Wavy
BodyPale, Teen
ClothesAnkle Socks, Dress, Lab Coat, Miniskirt, Necktie, Pleated Skirt, Rubber Band With Beads, School Uniform, Vest
PersonalityAtashi, Proactive, Relaxed
RoleRepeater, Researcher, Senpai, Twelfth Grader
Engages inTeasing
Voiced byNishizono Sumika


Mayu is an upperclassman of Satoru.

For a certain reason, she's purposefully stalling her graduation and repeating years. Usually calm and composed, but there are times when her more childish, attention-seeking side sneaks through.

Mayu has her own personal lab at the academy, which is where you can usually find her doing research on astral abilities. She's very good at making coffee and takes great pride in that skill of hers.

[From NekoNyan]

Side characters

Arihara Ryuunosuke在原 隆之介
HairRed, Short, Wavy
ClothesBelt, Shirt, Trousers, Vest
RoleManagement, Non-blood-related Father, Secret Identity
Voiced byHoudenteigatsu


Ryunosuke is the adoptive father of both Satoru and Nanami.

He both treats them and loves them like a real parent would. He earns his living by working at a cleaning company. Or that's what the official records say, at least. In reality, he works as chief of the secret organization that Satoru and others work for.

[From NekoNyan]

Ise Atsunori伊勢 篤紀
HairBlack, Short, Straight
ClothesNecktie, Suit, Tie Pin
PersonalitySerious, Stoic
Voiced byIchijou Kazuya


Ise Atsunori is the principal of Kikka Academy.

He's very pro-Astral in a society that's still rife with discrimination against them. He founded the academy with the hopes that it would help lead to the integration of Astrals into normal society.

[From NekoNyan]

Kakimoto Kaori柿本 香里
HairBrown, Parted to Side, Ponytail, Sidehair, Straight, Waist Length+
BodyAdult, Pale
ClothesPendant Necklace, Ribbon Hair Tie
RoleResearcher, Teacher
Voiced byKawashima Rino


Kakimoto Kaori is Satoru's homeroom teacher.

She can come off as rather callous because of her stony demeanor, but she's actually very caring and compassionate as a teacher. If a student asks her a question, she always give a very thorough, detailed explanation.

In addition to her job as teacher, she also does active research for the academy in the field of astron science.

[From NekoNyan]

Mibu Chisaki壬生 千咲
HairRed, Shoulder-length, Side Tail, Spiky Bangs, Twin Tails, V Bangs
BodyKid, Pale, Short
ClothesAnkle Socks, Bow Tie, Hairpin, Hair Tie, Hat, Hoodie, Miniskirt, Pleated Skirt, Swimsuit, Vest
PersonalityCurious, Energetic, Immature, Outgoing, Watashi
RoleClassmate, Kouhai, Tenth Grader
Voiced byKanako


Chisaki is a first-year student at Kikka Academy and a classmate of Nanami's.

She's incredibly bright and outgoing, which is seen in the fact that she made quick friends with someone as shy and antisocial as Nanami.

She has a bit of a complex regarding her small body, which prevents her from wearing more mature outfits, thinking she won't look good in them. However, she still enjoys looking fashionable, so she takes great care in selecting her wardrobe. Her keen interest in fashion also means that she enjoys giving advice to others and helping them choose outfits.

[From NekoNyan]

Suou Kyouhei周防 恭平
HairBlue, Kemonomimi, Shoulder-length, Spiky Bangs, Straight
BodyAndrogynous, Pale, Teen
ClothesBlazer, Hoodie
PersonalityFood Lover, Friendly, Opposite Gender Voiced
RoleClassmate, Eleventh Grader, Kouhai, Senpai
Voiced byHanazono Mei


Kyouhei is a classmate of Satoru's.

He's friendly, outgoing, and doesn't have a trace of timidness in his personality. He's generally pretty upbeat and kind, but the one thing that always gets him mad is when people mistake him for a girl because of his baby face and other feminine features. That being said, he's perfectly comfortable with the way he looks.

[From NekoNyan]