A Girl's Survival Guide to the Stars

Novel blurb:

In the age of interstellar exploration, humanity faces internal strife and external threats, and nearly everyone is a soldier. Serving aboard an advanced spacecraft means a much better chance of survival.

Song Nuannuan, a low-profile office worker from the 21st century, accidentally transmigrates to the interstellar future. Her looks have improved dramatically, making her unbelievably beautiful, but she's still a nobody with a combat rating of five. Her stats are below average across the board. Yet she works aboard the most advanced warship in the Human Alliance, because she is the legally recognized partner assigned by the AI to Einzel, the youngest and most brilliant commander in human history. She's clinging to an unbelievably powerful backer.

Song Nuannuan doesn't want to die. Trembling, she clutches the silver-haired young general by the trouser leg, tears welling in her eyes. As long as she doesn't have to feed the bugs or be used as cannon fodder, he can kiss her all he likes.

Being ready to die bravely? This baby really can't do that.

Fortunately, Einzel has always been especially fond of his little crybaby, Song Nuannuan. With his Nuannuan-branded leg ornament along for the ride, he battles through every obstacle and protects her, letting her live in peace and happiness for the rest of her life.

Theme: An utterly genuine weakling's struggle to survive in space