- The Guy She Was Interested in Wasn't a Guy at All characters center on two leads: Aya Oosawa and Mitsuki Koga.
- Aya is a fashionable, outgoing gyaru-style student drawn to rock music.
- Mitsuki is a quiet classmate whose androgynous record-store persona sparks the identity mix-up.
- Music is the shared language that bridges their very different social worlds.
- The series has sold 2.25M+ copies and won the 2023 Next Manga Award for web manga.
Main Characters Overview
The Guy She Was Interested in Wasn't a Guy at All characters are built around a sharp contrast: one loud, colorful, and expressive; the other reserved, cool, and musically fluent. Sumiko Arai's cast turns that contrast into the engine of the romance. The story follows Aya, a high-school girl who becomes fascinated by a stylish record-store employee, not realizing that person is her female classmate Mitsuki.
The table below summarizes the core cast at a glance:
| Character | Role | Personality | Style & Look |
|---|---|---|---|
| Aya Oosawa | Outgoing high-school student | Expressive, curious, quick to fixate | Gyaru-inspired fashion, lively presence |
| Mitsuki Koga | Quiet classmate, record-store worker | Reserved, cool, observant | Androgynous black-clad look, understated |
| Aya & Mitsuki (pair) | Central romantic pairing | Enthusiasm meets quiet reserve | Contrasting visuals that drive the premise |
Start with Volume 1 from Yen Press to meet the full cast in order. The character introductions in early chapters set up every later misunderstanding.
Aya Oosawa: Character Profile
Aya is the emotional center of the story. She is fashionable, socially active, and wears her feelings openly. When she encounters a cool, mysterious employee at a record store, her fascination is immediate and intense — she falls for the image before she understands the person.
Key traits:
- Direct enthusiasm: Aya does not hide her emotions well, which fuels both the comedy and the romance.
- Newcomer to the music scene: She is drawn to the alternative and rock culture surrounding the record store, learning as she listens.
- Growth through curiosity: Her interest in the store clerk leads her toward a deeper appreciation of music and of the person behind the counter.
Aya vs. Mitsuki: Contrast Table
| Aspect | Aya Oosawa | Mitsuki Koga |
|---|---|---|
| Social style | Outgoing, expressive | Quiet, observant |
| Fashion | Bright, gyaru-inspired | Dark, androgynous, minimal |
| Music relationship | Curious listener | Knowledgeable insider |
| Way of connecting | Words and emotion | Music and subtle gestures |
| School presence | Lively and visible | Unassuming classmate |
This guide keeps character descriptions spoiler-light. Later volumes reveal significant developments in how Aya and Mitsuki see each other — reading in publication order preserves the payoff.
Mitsuki Koga: Character Profile
Mitsuki is the quiet counterpart to Aya's energy. At school she is an unremarkable classmate; at the record store she becomes someone else entirely — stylish, confident, and cool. That gap between her two personas is the source of the series' central misunderstanding.
Key traits:
- Music as self-expression: Mitsuki is more comfortable communicating through records and recommendations than through small talk.
- Dual identity: Her androgynous shop look leads Aya to assume she is a boy, launching the premise without reducing Mitsuki to a stereotype.
- Inner warmth: Beneath the cool exterior, Mitsuki is attentive and emotionally invested, which surfaces gradually across the volumes.
Record-Store Persona
- Stylish and confident behind the counter
- Deep knowledge of rock and alternative music
- The "cool guy" image Aya falls for
School Persona
- Quiet classmate who blends into the background
- Aya does not connect the two identities at first
- Grounded, everyday high-school life
Emotional Core
- Cautious but genuinely caring
- Opens up through shared music moments
- Growth comes from letting Aya see the real her
Mitsuki's androgynous design is intentional storytelling. In an author interview with uDiscover Music, Sumiko Arai discusses how music, fashion, and self-presentation shape the characters — Mitsuki's look is identity, not disguise.
Character Relationship Dynamics
The romance works because the characters approach each other from mismatched starting points. Aya knows the shop persona; Mitsuki knows they are classmates. That information gap creates tension, comedy, and slow-burn emotional payoff.
| Dynamic | How It Develops | What It Reveals |
|---|---|---|
| Music exchange | Shared records and recommendations | A private channel between them |
| School encounters | Everyday classmate interactions | Mitsuki's hidden identity tension |
| Identity gap | Aya's false first impression | The series' core dramatic engine |
| Gradual honesty | Small steps toward the truth | Both leads' capacity for growth |
How to Follow the Characters While Reading
Meet the leads in Volume 1
Read Volume 1 to see Aya's record-store encounter and Mitsuki's two contrasting worlds side by side.
Track the music clues
Pay attention to which records and artists each character responds to — taste signals inner feelings.
Watch the small moments
The romance advances through glances, playlists, and awkward conversations rather than big plot twists.
Continue in publication order
Move to Volume 2 and follow the official Yen Press series page for new volumes.
Use this list to get the most out of the cast.
Character Watching Checklist:
- Note Aya's fashion shifts across chapters
- Track which songs Mitsuki recommends
- Compare Mitsuki's store and school behavior
- Watch for moments of honest eye contact
- Identify when Aya's feelings deepen beyond curiosity
Cast Context: Awards, Anime, and Where to Read
The cast's popularity is measurable: the series won the 2023 Next Manga Award in the web manga category, has sold over 2.25 million copies, and an anime adaptation is scheduled for 2027, streaming on Crunchyroll per the official anime site.
| Item | Detail |
|---|---|
| Japanese title | 気になってる人が男じゃなかった |
| Author | Sumiko Arai |
| Publisher (JP) | KADOKAWA |
| Publisher (EN) | Yen Press |
| Sales milestone | 2.25M+ copies worldwide |
| Major award | Next Manga Award 2023, Web Manga category |
| Anime premiere | 2027, streaming on Crunchyroll |
| Where to read | Yen Press, BOOK☆WALKER |
If you enjoy character-driven yuri romance with a strong music atmosphere, this cast will reward you. The series suits fans of school romance, slice-of-life, and music-centered storytelling alike.
FAQ
Q: Who are the main The Guy She Was Interested in Wasn't a Guy at All characters?
The two leads are Aya Oosawa, a fashionable and outgoing high-school girl, and Mitsuki Koga, her quiet classmate who works at a record store and presents a stylish androgynous persona there. Their contrasting personalities drive the romance.
Q: Why does Aya think Mitsuki is a boy?
Mitsuki's androgynous style and confident shop persona at the record store lead Aya to a wrong first impression. This identity misunderstanding is the central premise of the series.
Q: How does music connect the characters?
Music acts as a shared language. Mitsuki's deep knowledge of rock and alternative music shapes the record-store setting, while Aya's growing curiosity about the same music gives them a natural bridge before they truly know each other.
Q: Where can I read the official English edition?
Yen Press publishes the official English volumes. You can browse the series page or purchase digital editions through authorized storefronts such as BOOK☆WALKER.