Yuu Haruna is a shy, introverted high school boy who undergoes significant personal growth after forming a band and experiencing both heartache and triumph in the world of music.
Height: 168 cm.
Weight: 55 kg.
Blood Type: O.
Birthday: August 1, 2007.
Yuu has an unassuming look that often draws comments for lacking charisma, despite eventually becoming a central figure on stage.
He is most often seen fiddling with his smartphone, which further emphasizes his modern, understated style.
Initially introverted, Yuu is awkward, reserved, and struggles socially—often labeled as unapproachable or a "keyboard warrior" by his younger sister, Chitose Haruna.
He heavily relies on social media, especially Twitter, which contributes to misunderstandings and his passive public image.
Over time, music and bandmates help him break out of his shell, making him more communicative and emotionally open.
Although gentle and considerate, he lacks self-confidence about his appearance, particularly in comparison to his more striking friends.
Yuu starts as a first-year high schooler who prefers the online world to real-life interactions.
He gradually transforms through his involvement in forming and performing with the band The fallen moon, and later Blue Wells.
He faces major personal tragedies, including the loss of Fuuka Akitsuki, which deeply affects his outlook on life and music.
His journey includes overcoming both external pressures and his inner doubts, growing from an outcast to a dedicated performer.
Yuu is both the bassist and vocalist for his bands, The fallen moon and later Blue Wells.
He is the band’s main songwriter, drawing upon personal experiences for emotional and relatable lyrics.
Despite lacking visual charisma by industry standards, Yuu’s singing voice and gentle tone are highly praised.
He plays a Sugi Guitars NB4 bass.
Yuu has a complicated but close relationship with many people, especially Fuuka Akitsuki and Fuuka Aoi.
He is admired—often romantically—by several female characters, including Fuuka, Koyuki Hinashi, Sara Iwami, and others.
His relationships frequently spark jealousy among peers due to his subtle magnetism and quiet kindness.
He has a strained but supportive connection with his family, including his younger sister Chitose Haruna.
Bandmates such as Kazuya Nachi, Sara Iwami, Mikasa Mikoto, and Nico play important roles in his development and recovery from trauma.
Yuu’s online habits, especially his Twitter usage, are based in part on the author’s own experiences and anxieties.
A unique crossover Valentine’s Day project revealed his awkwardness around girls—famously, he asked his sister Chitose Haruna for chocolate and was bluntly rejected.
His weekly self-pleasure count was humorously exposed as 24 times during a crossover, showing his quirky and human side.
Although he is often teased for lacking "star quality," his genuine and sensitive nature wins over countless fans and friends.
“I'll carve Fuuka’s wish—that we five will stand on the Budokan stage—into my heart...”
“If you can't turn despair into music, what's the point?”
“Even if I get left behind, I have to keep moving forward.”
High School Beginnings & Band Formation
Yuu begins his story as a high school freshman, withdrawn and constantly glued to his smartphone.
He meets Fuuka Akitsuki, whose outgoing personality and love for music guide him to form the band The fallen moon.
Initially struggling with confidence, he gradually opens up and finds his voice through performance and friendship.
A viral photo controversy involving Koyuki Hinashi nearly derails their school festival debut, but with support from friends, Yuu and the band turn disaster into triumph.
Loss, Despair, and Rebirth
After becoming mutually affectionate with Fuuka Akitsuki, tragedy strikes when she dies in a car accident on the day of their first live house performance, leaving Yuu devastated.
He withdraws from friends, abandons school and music, and sinks into despondency until a voicemail from Fuuka Akitsuki reignites his passion to continue their dream.
Steeled by inspiration and tough love from fellow musician Nico, Yuu resolves to restart The fallen moon, rekindling old bonds and creating the original song “Fair Wind.”
He vows to never update Twitter again, symbolizing his break from his old reclusive self.
Professional Struggles & New Relationships
Yuu faces harsh realities in the music industry, including manipulative producers, grueling contract terms, and financial crises.
He becomes close to Fuuka Aoi and ultimately forms Blue Wells after a dramatic band shakeup stemming from the revelation about Aoi’s father’s involvement in Fuuka Akitsuki's accident.
On tour across Japan, Yuu grows emotionally—and musically—as he confronts past wounds, new supporters, and the pressures of fame.
Personal Growth & Resolution
Yuu’s journey intertwines love, regret, and ambition as he supports and is challenged by his bandmates.
He overcomes jealousy, rivalry, and internal doubts, culminating in performing at major events and reconciling with his memories of Fuuka Akitsuki.
Through numerous setbacks—including legal battles, rival sabotages, and grueling self-improvement—Yuu helps reforge Blue Wells into a lasting symbol of hope and fulfillment.
His heartfelt love confession to Fuuka Aoi marks his final step to emotional maturity and happiness.
Yuu’s development reflects the author’s own fascination with social media and transformation.
His unusual quirks, struggles with self-image, and deep underlying kindness paint a realistic portrait of a young man navigating love, loss, and music.
Despite the lack of classical “star power,” Yuu’s sincerity and determination earn him a special place in the hearts of friends, fans, and readers alike.
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