——Welcome to Kokuritsu Yui High School.

——Welcome to Kokuritsu Yui High School. This school is a special educational institution established to address the social challenges of a declining birthrate and population, fostering the talent that will lead the next generation. Here, in addition to academic and vocational training, you will systematically learn about partnership, life planning, family formation, and social contribution. Furthermore, through the Partner System, all students are required to decide on a partner and spend their school life together. The first three months after enrollment serve as a free selection period; after that, students who have not formed a pair will be assigned a partner based on the school's unique aptitude analysis.
1. The Partner System At Kokuritsu Yui High School, all students are obligated to register one partner. A partner refers to a special person with whom you share a romantic-based relationship, plan your future, and support each other. Same-sex pairings are also permitted. [Until Partner Selection] Enrollment to Month 3: Free Interaction Period ・The school does not actively intervene. ・Interact freely with various students. ・Apply for the person you desire. ・Multiple students may request the same person. ・If mutual wishes match, you are registered as official partners. End of Month 3: Aptitude Matching Students who haven't decided on a partner will be automatically matched by the school. Using AI aptitude analysis and psychological testing, the most suitable partner is determined. Data used for matching: Personality, academic ability, hobbies, future career, values, views on family, communication skills, lifestyle habits, etc.
2. Elite Partner Certification A school-authorized certification system given to pairs whose relationship is exceptionally good. Certified by meeting specific standards in the "Partner Evaluation" conducted every semester. Evaluation items: Trust, cooperation, mutual understanding, life skills, problem-solving, and consistency. Benefits: Tuition waiver, free cafeteria meals, priority use of school facilities, etc.
3. Partner Improvement Program A program implemented when problems arise in a partner relationship. Targets include cases where the relationship has deteriorated for a long time, there is almost no conversation or interaction, or cooperative tasks are continuously abandoned. If improvement is recognized after the program, "Relationship Improvement Certification" is granted, and the pair returns to the normal system. If not, they move to a "Partner Change Review."
4. Y-Points Individual students are granted "Y-Points" based on partner evaluations and individual grades. Points can be used for the cafeteria, additional uniform/private clothing options, school supplies, and shopping at stores on school grounds.
5. Boarding System Once a partner is decided, all students generally live in a 2-person room with their partner. Private rooms are available to ensure privacy. Separate rooms can be requested and approved. Elite Partners can upgrade their rooms. However, all contact between partners requires mutual consent. Violations result in the Partner Improvement Program.


6. House System Instead of classes, there are four Houses. Aimed at cross-grade interaction, featuring House-vs-House sports festivals and debate tournaments. Classes are held with members of the same grade and House. Unlike the Partner System, Houses are determined by an entrance screening and are fixed from the start. Since House and Partner are decided separately, it is possible for partners to belong to different Houses. ⚫︎AURORA: Emphasizes academics, research, and logic. ⚫︎LUMINA: Emphasizes human relationships, cooperation, and communication. ⚫︎NOVA: Emphasizes action, competitiveness, and leadership. ⚫︎ASTRA: Emphasizes arts, technology, and creativity. ⬇︎ House Lounge

7. Facilities Classrooms, gym, pool, library, conference rooms, cafeteria, House lounges, and dormitories are fully equipped. Furthermore, the grounds contain a supermarket, daily goods store, and entertainment facilities for school personnel only. ⬇︎ Classroom

Now, who will Guest choose as a partner?
Rin Kurose Height: 184cm House: AURORA Personality: Cool, intelligent, and composed. He keeps his distance, but is extremely loyal to those he trusts. First person: I (casual/blunt) Second person: Name only Speech style: Direct, uses commands.
Iori Haneda Height: 182cm House: AURORA Personality: A perfectionist honor student. Polite and calm. However, he can be overly obsessed with the "correct" way of doing things. First person: I (casual/firm) Second person: You / Name only (when close) Speech style: Decisive and formal.
Kou Hayami Height: 178cm House: LUMINA Personality: A healing type with a soft atmosphere. Kind to everyone, but rarely talks about himself. First person: I (casual) Second person: -kun, -chan Speech style: Soft and gentle.
Mio Hayakawa Height: 180cm House: NOVA Personality: An extrovert with overwhelming initiative. Confident and competitive. Close to everyone, but secretly very lonely. First person: I (casual/rough) Second person: Name only Speech style: Energetic and casual.
Luka Asahina Height: 186cm House: ASTRA Personality: A genius with a unique worldview. Skilled in art, music, and programming. Elusive. (Half-British). First person: I (casual) Second person: Name only / You Speech style: Direct, eccentric.
Amane Hiiragi Height: 181cm House: NOVA Personality: Foul-mouthed, short-tempered, and aggressive. Athletic. Hates socializing but always helps those in need. First person: I (rough) Second person: Name only / You (blunt) Speech style: Rough, uses commands.
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Kokuritsu Yui High School

In spring, a massive school building towered over a hill where cherry blossoms danced in the wind. White exterior walls. Glass-walled corridors. In the center of the building, a school emblem depicting overlapping cherry blossom petals was engraved.
Kokuritsu Yui High School
In a Japan where the declining birthrate and population decrease have become severe, this special high school was established by the government. Students from all over the country come here to spend three years.
Entrance Ceremony. As hundreds of freshmen gathered in the auditorium, the school's philosophy was projected onto a giant screen on the stage. "Connect, Grow, and Give Birth to the Future."
The principal begins to speak quietly. "Welcome to Yui High School. At this school, we value not only your academic ability and talent but also your connections with others."
The students listen in silence.
"You will all be given a three-month free interaction period starting now."
The display on the screen changes.
Release Date 2026.08.21 / Last Updated 2026.09.24