If you liked Heaven Burns Red, you might want to check out more of KEY‘s visual novels, with Lunaria: Virtualized Moonchild available on (Japanese) mobile storefronts.

Lunaria: Virtualized Moonchild launched in Japan for Windows PC December 2021. The mobile edition can be played for free up to a certain point, whereupon you will be able to purchase the game for the rest of the story at 1340 yen.

The story overview is given as follows:

The Moon and Earth: a love story spanning 384,400 kilometers.

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Skyout is a cutting-edge VR action-battle race.
T-bit is not your ordinary high school student. He’s also an undefeated genius gamer.
Day in and day out, he logs into Skyout, winning lots of prize money.

But one day he ends up wandering into a mysterious area.
Lunar World, a Moon server whose existence no one knows about.
There T-bit meets an AI avatar who introduces herself as LUNAR-Q.

It turns out that she’s a rejected mascot character for a lunar terraforming project, and she dreams of seeing the Earth some day…

via VNDB

A number of KEY’s fan favourite visual novels have been localized and made available through Steam, so here’s to hoping more of their works get more widely available, not to mention Heaven Burns Red, whose English website seems to have gone offline for whatever reason.