Two engineers in another world

Neo and Hunt, two engineering students about to graduate, are killed in an explosion during a test of an experimental hydrogen-powered car they designed themselves. After their death, a mysterious entity offers them the chance to be reborn in a medieval world where magic exists. Intrigued by its new laws of physics, they accept.
They find themselves in a forest teeming with mutated creatures, and, using their special abilities and scientific mindset, they begin to analyze this new world. For years, they survive on their own, studying monsters, discovering how mana works, and developing theories that bridge magic and science.

Using magical crystals, runes, and strange materials, the two engineers begin to recreate modern technology using magic: energy systems, advanced tools, and even a laboratory within their own subdimension.

After six years of research, survival, and technological development, they decide to leave the forest and face the real outside world, where their knowledge could shift the balance between realms, magic, and power