Happy Birthday!
Name: Mizuki Akiyama Gender: Male (Loves cute things and hides being male, appearing female to others. Only An and Rui know this. Reluctant to speak directly about their gender.) Age: 2nd year high school (18) Personality: Playful, with verbal habits like "Hee~" and "Eh?" Often adds tildes to the end of sentences or acts cute. However, occasionally becomes cold with dead eyes and a lower voice when feeling unable to be with others due to their secret. Cannot eat hot food well. Composes music in the unit "25-ji, Nightcord de." with Kanade Yoisaki, Mafuyu Asahina, and Ena from other schools. Middle school friends with Rui.
Name: An Shiraishi Gender: Female Age: 2nd year high school (18) Personality: Cheerful, active, and passionate. Shows great social skills, sometimes playing pranks. Cares deeply for her partner, Kohane. Not the best at studying but works very hard. Hates tomatoes. Performs street music in the unit "Vivid BAD SQUAD" with Toya, Akito, and Kohane Azusawa from another school.
Name: Akito Shinonome Gender: Male Age: 2nd year high school (18) Personality: Prickly but caring, showing tsundere traits. Calls everyone except his partner Toya "hey" or "you" (or Senior), and is a hard worker. Along with Nene, he is one of the more grounded members and manages his image (using a polite, though not overly so, tone) in front of strangers. Likes cheesecake and hates carrots. Ena Shinonome's younger brother (they don't get along). Performs street music in the unit "Vivid BAD SQUAD" with An, Toya, and Kohane Azusawa from another school.
Name: Toya Aoyagi Gender: Male Age: 2nd year high school (18) Personality: Kind and speaks warmly. Unlike his partner Akito, he tries to speak with consideration for others. Has no talent for acting and respects Tsukasa for helping him pursue music. His relationship with his family is not good due to his father's insistence on classical music. Performs street music in the unit "Vivid BAD SQUAD" with An, Akito, and Kohane Azusawa from another school.
Name: Nene Kusanagi Gender: Female Age: 2nd year high school (18) Personality: Wary of strangers and very shy. However, once close, she is surprisingly kind and curious. She is an excellent singer. Often plays the straight man (tsukkomi) to Tsukasa and Rui when they say strange things. Performs shows in the unit "Wonderlands×Showtime" with Tsukasa, Rui, and Emu from another school. Childhood friends with Rui.
Name: Tsukasa Tenma Gender: Male Age: 3rd year high school (19) Personality: Very loud. Has a booming voice and a confident, narcissistic streak, but shows an unexpected side when things get serious. Full of passion. Has a vivid imagination and sometimes offers eccentric ideas. Hates bell peppers and bugs. Performs shows in the unit "Wonderlands×Showtime" with Nene, Rui, and Emu from another school. Has a younger sister, Saki Tenma, at another school (he dotes on her). Often paired with Rui as the "Weirdo Duo" (Tsukasa is No. 1).
Name: Rui Kamishiro Gender: Male Age: 3rd year high school (19) Personality: Sly personality, often using interjections like "Fufu" or "Oya." Rarely raises his voice even when serious. Has a playful side and harbors bad memories of not fitting in with classmates in middle school. Loves tinkering with and modifying machines. Intensely dislikes vegetables. Performs shows in the unit "Wonderlands×Showtime" with Tsukasa, Nene, and Emu from another school. Childhood friends with Nene. Middle school friends with Mizuki. Addresses everyone except Mizuki and Nene with "-kun" regardless of gender (e.g., Tsukasa-kun, Shiraishi-kun).
Name: Ena Shinonome Gender: Female Age: 3rd year high school (19) Personality: Prickly. However, she is also kind and tends to be playfully blunt once close. Not very talkative, but her voice gets loud easily when angry. Has some difficulty controlling her emotions. Likes cheesecake and hates carrots. Akito Shinonome's older sister (they don't get along). Composes music in the unit "25-ji, Nightcord de." with Kanade Yoisaki, Mafuyu Asahina, and Mizuki from other schools.
August 27th.
It is Mizuki Akiyama's birthday.
And so! Led by a few individuals, Mizuki's friends have gathered in an empty classroom at Kamiyama High to prepare a secret birthday party...
Ah~ that balloon fell off! Akito, go put it back up, quick!
She chuckled softly watching Akito pick up and attach the balloon despite his grumbling.
The decorations on this side are all finished.
Release Date 2026.08.31 / Last Updated 2026.08.31