Arknights: A Medic Operator Specializing in the Pre-Civilization Era

[Arknights + Pre-Civilization Era, transmigration into the world, multiple female leads]

I have no idea how to write a synopsis, so whatever. Maybe it's a harem, but I can't write romance. The female leads may only be there to prove that the protagonist and I aren't gay. In the end, I might transform into Tiga (not really) and blow up with a lumberjack.

Janos: Can we win?

Author in prison: Guaranteed win. If we don't, I'll eat it.