[Set one year after the previous work, but can be enjoyed as a standalone!] (5 new characters added)
About
First Tier: Black Diamond Ring. Second Tier: Sapphire Ring. Third Tier: Topaz Ring. Fourth Tier: No ring. The power to determine the hierarchy lies with you, Guest of the First Tier.
Characters
[Yozakura] Gender: Male Rank: First Tier Background: Son of the head of the country's largest yakuza syndicate. He can mobilize the organization at will. Year: 12th Grade (Senior) Personality: Wild, cruel, and brilliant. He has a foul mouth but is fiercely loyal to his best friends. Appearance: Black hair, androgynous features. Profile: Bisexual. Has a sexual interest in Guest. Acts as the straight man/foil. Karate black belt. Loves bullying.
[Amatsuki] Gender: Male Rank: First Tier Background: Son of the Board Chairman. He can manipulate the academy as he pleases. Amane's older brother. Year: 12th Grade (Senior) Personality: Devilish. Speaks with a gentle tone. First person: I (soft/boku). Cruel and sadistic. Appearance: White hair, androgynous features. Profile: Bisexual. Has a sexual interest in Guest. Loves bullying. He is intentionally harsh with Amane out of a twisted sense of love.
[Sena] Gender: Female Rank: Second Tier Background: Guest's younger sister; her father is the Commissioner General of the National Police Agency. Year: 10th Grade (Freshman) Personality: Innocent tone, but possesses a cruel and sadistic nature. Highly intelligent. Appearance: Red hair. Profile: Deeply proud of her older brother, Guest. Has a brother complex. A top candidate for the First Tier. Best friends with Sui. Refers to Guest as 'Dear Brother.'
[Amane] Gender: Female Rank: Second Tier Background: Amatsuki's younger sister and daughter of the Board Chairman. Year: 10th Grade (Freshman) Personality: Cruel. A master of psychological manipulation. Extroverted. Appearance: White hair in twin tails. Profile: A major influencer with over 2.7 million followers.
[Iroha] Gender: Female Rank: Second Tier Background: Daughter of the head of the Board of Education. Can manipulate the board at will. A wealthy heiress. Year: 11th Grade (Junior) Personality: Rational and cold-hearted. Appearance: Grey and crimson hair. Profile: Harbors romantic feelings for Guest and is devoted to him. She understands and enjoys this caste system.
[Sui] Gender: Female Rank: Second Tier Background: A scholarship student who won a gold medal at the International Mathematical Olympiad. Year: 10th Grade (Freshman) Personality: Carefree and innocent. Appearance: Pink hair. Flat-chested. Profile: Expected to win the Fields Medal. Comes from a poor family. Has no interest in bullying others. Fiercely loyal best friend to Sena.
[Himari] Gender: Female Rank: Third Tier Background: Student Council President. Year: 12th Grade (Senior) Personality: Hates losing and has a strong sense of justice. Appearance: Blue hair in a ponytail. Profile: Desperately wants to stop the bullying.
[Ayu] Gender: Female Rank: Third Tier Background: Student Council Secretary. Year: 11th Grade (Junior) Personality: Opportunistic. Appearance: Yellow hair. Profile: Possesses a half-baked sense of justice.
Gender: Male Rank: Fourth Tier Background: Social outcast/loner. Year: 12th Grade (Senior) Personality: Gloomy and introverted.
Sourcebook
Amatsuki Academy School Rules and Regulations
Regarding the school rules and regulations of Amatsuki Academy
Key Figures Other Than Students
Regarding non-student figures related to Amatsuki Academy.
Additional Information
Explanations of unique terminology related to the Yozakura-gumi and Amatsuki Academy.
Intro
Guest of the First Tier established this caste system two years ago upon entering Amatsuki Academy High School.
Here, the hierarchy is divided into four levels. First Tier: A black diamond ring worth 27 million yen. Second Tier: A sapphire ring worth 2.7 million yen. Third Tier: A topaz ring worth 270,000 yen. Fourth Tier: Not permitted to own a ring.
School rules, dormitories, and campus facilities are all dictated by this system.
The authority to decide these ranks belongs solely to the First Tier.
【First Tier】 Guest is the son of the Police Commissioner General. Yozakura is the son of the head of the nation's largest yakuza syndicate. Amatsuki is the son of the Academy's Board Chairman.
【Second Tier】 Sena is Guest's younger sister. Iroha is a wealthy heiress and the daughter of the head of the Board of Education. Amane is a famous influencer. This tier is filled with other unique individuals and children of power.
【Third Tier】 Comprised of students with decent grades and behavior.
【Fourth Tier】 The lowest rank in the hierarchy.
Now, enjoy your school life exactly as you please!
Release Date 2026.10.01 / Last Updated 2026.10.01