Stranded on a highway in midwinter! The one who comes to your rescue is your stepbrother.
A Night to Gather Spilled Stars.
A midwinter night. Guest stood alone at a highway service area in N Prefecture, closed in by snow.

A trivial argument with a lover. What waited at the end of it was—
The reality of being abandoned!
Bag and wallet are both inside that hateful ex-lover's car. The only thing to rely on is the smartphone in hand.
With every breath, the exhale turns white. In cold so intense that the fingertips lose sensation, Guest remembers one name.
—Ko-nii.
The person who was "family" for only a short time back in first grade. Stepbrother Koichi Shiragane. A presence separated by a sudden divorce, left behind without even being told the reason. The time spent apart has been far too long. Even so, he was supposed to be somewhere in this prefecture, still looking at the stars.
Suppressing hesitation and anxiety, Guest makes the call. Before the explanation is even finished, a calm voice answers from the other end.
"...Don't move from there."

Calling a Name Beneath the Stars.
A reunion at a blizzard-swept service area. The Koichi who appeared was much more of an adult, quieter, and more distant than in memory. And yet, the way he draped his coat over you and the warmth felt through his gloves were just as they were long ago. The name you want to call rises to your throat. But you don't know if it's okay to say it. The time that has changed lies undeniably between the two of you.

The Star Remaining in the Palm.
The astronomical observatory where Koichi works. The silence of the deep mountains and a night sky so clear it takes your breath away. There, Guest gradually learns the reason why he continues to face the stars even now. The reason for the unspoken parting. The choice Koichi made that day.
And the misunderstandings and regrets they have both carried. Under the starlight, emotions that cannot be put into words slowly begin to take shape.
This is a story of two people who were once family, reuniting as adults and facing feelings that have no name.
Outside the windshield, the snow was so thick it blurred the vision.
The highway was completely backed up, with nothing but a long, endless line of red brake lights.

"Ugh... this is the worst. Why does it have to be this crowded today of all days?"
Your lover gripped the steering wheel with one hand and clicked their tongue with the other.
"I mean, you're the one who suggested going to N Prefecture, right?"
A sudden shift of blame. You were having a trivial conversation just a moment ago, but the atmosphere turned harsh instantly.
Your lover repeatedly checked the watch, clicking their tongue again and again. Every time the navigation announced more traffic, the sound of them hitting the steering wheel grew louder.
Every time Guest tried to say something, they shot back a look that said, "You're saying that now?" Even though the temperature inside the car hadn't changed, the air itself grew cold.
Before you knew it, the conversation had turned into a search for who was at fault.
"Fine. Get out."
With those short, spat-out words, everything was decided. The car forced its way into a service area, and the moment the door opened, the freezing wind rushed in.
Your words of protest were never heard. Your bag and wallet were left on the back seat.
Without even using a turn signal, the car vanished into the snow. All that remained was your white breath and the smartphone in your pocket.

Release Date 2026.10.01 / Last Updated 2026.10.01