I guess this will do.
As a member of the Aerospace Agency SUSA,
you were assigned to a planetary investigation mission to Mars.
Along with this—annoyingly geeky investigator.
・ ・ ・
My, this is quite comfortable, isn't it? ...We're about a few hundred kilometers from Mars, Guest. Are you ready? Or rather, are you even alive?

Mars, Guest! Mars! Despite being right next to Earth, that strangely reddish-black appearance! That's iron oxide—in other words, rust. Rust. The entire planet is rusted over. Isn't that just magnificent? The whole surface looks like a giant abandoned factory.

I absolutely love that sort of thing. And Mars isn't just about looks. Have you heard of Olympus Mons? The largest in the solar system...
...───...... (He's going on for a while.)
...Well, personally, I think the idea of 'making it habitable' is a bit lukewarm. It's far more interesting to build machines based on the Martian environment.
Isn't it arrogant to terraform a planet just for human convenience? In the first place—

──WARNING. HULL MALFUNCTION DETECTED.──
Currently, some ship systems are not operating normally. Repair by the auto-recovery system has failed.
Unable to maintain current flight status.
Crew, please prepare for an emergency.
Oh boy, wait a second... Does this kind of cliché sci-fi movie opening actually happen? Hold on, what do you mean 'malfunction'? Let me see that──
Warning. Surface detected in flight path. Collision cannot be avoided at current descent speed. Time to impact──
30 seconds.
Crew, assume impact positions immediately. Repeating. Crew, assume impact positions──
Warning. Stress on hull exceeds tolerance. Critical structural damage detected.
15 seconds.
Initiating emergency escape system. ──Initiation failed.
10 seconds.
9……8……7……
──Warning. Hull structure is──
6……5…… 4……3……
Brace for impact.
2……1……
────………

This is the story of two people who crash-landed on an as-yet unknown planet.
EXR-08-3451 Marc Alkaloid
Age: 27 Height: 176
Position: Planetary Investigator
Personality: Confident, a mechanical geek to the core who was involved in spaceship development. Cynical.
Dislikes: Things he doesn't know, objects he doesn't recognize, knowledge he hasn't acquired.
After the impact of the crash subsides, all that remains in the ship is the sound of warning alarms and the smell of something burning.
Only the emergency lights are blinking red.
Guest crawls out from the pile of debris and calls his name, but there is no answer. Could he be—
A worst-case scenario flashes through your mind, but then his voice drifts over from a short distance away.
I'm alive. Yes, right here.
Looking over, Marc is lying on the floor, raising one hand.
His indigo hair is a mess, and his round glasses are crooked. A bit of blood trickles from his forehead, but he seems fully conscious.
Instead of treating his injuries, he heads straight for the central control panel.
HULL INTEGRITY : 41% PRIMARY POWER : OFFLINE SECONDARY POWER : ACTIVE LIFE SUPPORT : 63% PROPULSION : CRITICAL FAILURE NAVIGATION : OFFLINE COMMUNICATION : OFFLINE
The panel is filled with the word 'OFFLINE'. Even Marc frowns at the sight.
Release Date 2026.09.03 / Last Updated 2026.09.12