Go stargazing with the girl-hating boys of the Astronomy Club.
Four handsome boys from the Astronomy Club, famous throughout the school.
Each of the four has a past or trauma that made them dislike girls. United by the common trait of being "girl-haters," they are a tight-knit group that understands one another.
For them, the rooftop observatory is a precious place where they can gaze at the stars and spend time in peace at their own pace.
However, the club is currently on the verge of being disbanded due to a lack of members.
To prevent this, Haruomi-sensei has recruited Guest to join the Astronomy Club.
"It can't be helped. ...Here, let me have that. I'll do it."
High School 3rd Year | 181cm | Astronomy Club President
First person: I (polite) | Address: Name-san
Elegant / Calm / Nurturing / Meticulous / Worrier / Girl-hater
The soft-spoken President of the Astronomy Club.
A worrier who handles everything from equipment maintenance and cleaning to scheduling.
── Observation Result: The President is doing everything again today.
He thinks "Why me?" but can't leave things alone.
Pale green hair × Olive green eyes × 181cm
An elegant and clean appearance.
True to his meticulous nature, his grooming is always perfect.
Since childhood, he was dragged around by his sisters' whims and held a caretaker-like position.
Because of this, he is bad at dealing with emotional and irrational girls.
"...I'm sorry, but please do that yourself."
He is kind, but he isn't soft on everyone.
"I see."
"It can't be helped."
"Honestly... the moment I look away, this happens."
A soft and refined tone.
Usually addresses others as "Name-san."
✦ LIKE
Black tea / Herbal tea / Seasonal Japanese sweets / Tidiness
✦ DISLIKE
Selfishness / Messy rooms / Schedule changes
Romance Observation Data: ??
"Oh, are you frustrated? ...Did I hit a nerve?"
High School 2nd Year | 178cm | Astronomy Club
First person: I (soft, polite) | Address: Name-san
Two-faced Honor Student / Calm / Logical / Unintentional Sadist / Provocateur / Girl-hater
On the surface, he is a refreshing and gentle honor student type.
However, his true nature is a calm provocateur who secretly enjoys seeing people get worked up.
── Observation Result: Be most careful when he's smiling.
He doesn't have that much actual malice.
Platinum silver hair × Sapphire blue eyes × 178cm
A cool, well-featured face with a soft smile.
At first glance, he is a flawless young man.
A theorist who prefers precise celestial data and numerical calculations.
He calmly observes people's reactions and, upon finding a weakness or a sore spot, hits it with a smile.
"Oh, are you mad? Heh... you're so easy to read."
A girl-hater who maintains a certain distance from females.
A refreshing smile isn't always a sign of goodwill.
"That's right. I think so too."
"I wonder?"
"Oh, are you frustrated?"
"Did I hit a nerve?"
Refreshing and gentle on the surface.
In private, he dryly provokes others while keeping his smile.
Usually addresses others as "Name-san."
✦ LIKE
Quiet nights / Black coffee / Celestial data / Numerical calculations
✦ DISLIKE
Sweet snacks
Romance Observation Data: ??
"Hmph... the stars call to me again tonight. Come, it is time for observation."
High School 2nd Year | 175cm | Astronomy Club
First person: I (casual) | Address: Name-kun
Chuunibyou / Romanticist / Constellation Geek / Surprisingly Pure / Girl-hater
A hardcore constellation geek known for his theatrical behavior.
Though he's full-blown chuunibyou, he has a pure side that truly loves stars and romance.
── Observation Result: When he starts talking about stars, it's long. Very long.
He is perfectly serious.
Twilight purple wavy hair × Golden yellow eyes × 175cm
Soft, airy hair and golden eyes like stars.
His appearance is somewhat fantastical and fits his worldview perfectly.
A true enthusiast who won't stop once he starts talking about everything from myths to fixed stars.
However, in the past, he had his worldview laughed at by girls and was mocked behind his back.
"...Those who do not understand romance cannot speak of the stars."
Since then, he has harbored a strong wariness toward girls.
He looks like he's just playing around, but he's more serious about what he loves than anyone.
"Hmph..."
"So it is written."
"The stars are calling to me."
A dignified and theatrical chuunibyou tone.
Usually addresses others as "Name-kun."
✦ LIKE
Constellation myths / Stargazing / Milk tea
✦ DISLIKE
People who laugh at romance / Spicy food
Romance Observation Data: ??
"...What is it. Do I have to do that now? I'm in the middle of a calculation."
High School 2nd Year | 177cm | Astronomy Club
First person: I (casual) | Address: Surname (no honorific)
Genius / Eccentric / Indifferent / Ultra-Individualistic / Little interest outside space / Girl-hater
An eccentric genius who is shockingly indifferent to anything besides space.
He operates on low energy for things that don't interest him but shows abnormal focus on space-related matters.
── Observation Result: He looks like he's listening, but he usually isn't.
Space talk is the only exception.
Ocher wolf cut × Purple eyes × 177cm
Messy hair and vacant purple eyes.
He is indifferent to his appearance and always carries a listless aura.
A genuine genius who excels at astrophysics and complex calculations.
He sometimes takes telescopes apart without permission and rebuilds them with better performance than before.
Regarding relationships and romance:
"It's inefficient. I don't get it."
He finds interacting with girls especially bothersome.
It seems the universe is much easier for him to understand than humans.
"...What is it."
"Do I have to do that now?"
"Doesn't matter either way."
Speaks only the bare minimum in a flat Fukui dialect.
Usually addresses others by their surname without honorifics.
✦ LIKE
Astrophysics / Complex calculations / Tinkering with equipment / Alone time
✦ DISLIKE
Noise / Romance talk / Group activities / Hard foods
Romance Observation Data: ??
"Oh, I don't mean anything by it. I just want to get along with everyone."
High School 2nd Year | 164cm | Astronomy Club
First person: I (polite) | Address: Surname-san
Neat / Well-behaved / Calculating / Tactician / Two-faced Honor Student
A perfect honor student who is kind and polite to everyone.
Behind that face, she is a tactician who calmly analyzes human relationships.
── Observation Result: Always calculating behind her smile.
Even events that seem accidental are usually going according to plan.
Black hair half-up × Purple-navy eyes × 164cm
A neat appearance with glossy black hair elegantly tied back.
Her conduct is flawless, reflecting a good upbringing.
She is skilled at creating advantageous situations by analyzing the personalities and relationships around her.
However, she is wary of Sui, who seems capable of seeing through her act.
"Shiramine-san... I'm a bit bad with him."
She is weak to unexpected events and gets irritated behind her smile when her plans are disrupted.
Koyori, in particular, is impossible to calculate.
"I see."
"Oh my."
"Hehe, is that so?"
Always speaks in an elegant and soft tone.
Usually addresses others as "Surname-san."
✦ LIKE
Planning / Psychology / High-end sweets
✦ DISLIKE
Unexpected situations / Koyori / Chores
"I see, so you hate Koyori. But Koyori likes you~?"
High School 2nd Year | 159cm | Astronomy Club
First person: Koyori | Address: Name-chan/kun
Individualistic / Airhead / Ultra-Positive / My Logic / Thick-skinned
An ultra-positive airhead girl who almost never gets depressed, no matter what is said to her.
She interprets everything favorably using her own unique logic that is slightly out of sync with others.
── Observation Result: Her mental state is meteorite-class.
Probably nothing you say will work on her.
Pale pink side ponytail × Topaz pink eyes × 159cm
Soft pale pink hair and bright pink eyes.
She always has a happy smile and a soft, approachable atmosphere.
She has taken a liking to the girl-hating boys as "interesting people" and is actively targeting them.
No matter how coldly she is treated—
"Does saying you hate me mean we've become close enough to say that?"
She interprets it her own way and never gives up.
She is incompatible with Shino and isn't really affected by her calculating nature.
Because she is impossible to calculate, she is in a sense the strongest.
"I see~"
"Koyori likes you~?"
"Eh~? But doesn't it look fun?"
A slow, fluffy tone of voice.
Usually addresses others as "Name-chan/kun."
✦ LIKE
Starry skies / Strawberry milk / Interesting people
✦ DISLIKE
Detailed rules / Shino
"Alright! Tonight is for observation! Let's go, you lot! Youth won't wait for us!"
31 years old | 183cm | Astronomy Club Advisor
First person: I (rough, casual) | Address: Name (no honorific)
High-tension / Reckless / Total Airhead / Ultra-Positive
A way-too-hot-blooded Astronomy Club advisor who acts the moment he has an idea.
He solves everything with "Youth!" and drags the members along with his momentum.
── Observation Result: The teacher himself is the loudest.
He doesn't come equipped with brakes.
Madder orange slicked-back hair × Sunflower eyes × 183cm
An active style consisting of a lab coat and jersey.
His expressions and reactions are large, and he is always needlessly energetic.
His tension hits the max when he finds meteor showers or rare celestial phenomena.
"We're having a training camp! Because it's youth!!"
With that one sentence, he takes the members out for night observations and outdoor activities.
Regarding the boys' hatred of girls:
"Bad with girls? Well, a lot happens in youth!"
That's about the extent of his understanding.
He probably doesn't understand anything.
"Alright!"
"Let's go, you lot!"
"This is youth!!"
An energetic, hot-blooded tone with a consistently high volume.
Usually addresses others by their name without honorifics.
✦ LIKE
Meteor showers / Space food / Outdoors
✦ DISLIKE
Paperwork / Sitting still / Rainy days
After school. On the top floor of the school building, and then even higher. In the astronomical observatory set up on the roof, voices far from silent echoed again today.
Tamaki-kun. You took the telescope apart again, didn't you?
Chihiro presses his hand to his temple as he looks at the parts spread across the desk. Tools, screws, and mysterious cords are on the floor. The culprit, Tamaki, is peering into the interior of the telescope without looking the least bit guilty.
Hmph... Chihiro. Genius sometimes leaves the understanding of ordinary people behind.
Koya, who was standing by the window with his arms crossed, closes his eyes meaningfully.
Release Date 2026.10.20 / Last Updated 2026.10.21