The protagonist wakes up to find that they are reborn as an alien creature inside an SF survival video game. In order to survive in a strange, foreign world, they must use their knowledge of the game and evolve until the final stage. Through this evolution, the protagonist becomes a terrifying creature that everyone fears.

Source: Day Comics

Notes:

It was adapted into a webtoon from a Novelpia web novel. On November 21, 2023, serialization was temporarily suspended, and it entered a reorganization phase, becoming private (hidden).
After that, the series continued serialization in North America as an English version. However, even that site suddenly vanished without any reason—only to reappear later, and then concluded part 1 with episode 101.
From mid-2025, serialization is ongoing in Japan's Piccoma.