Reborn + Childhood Sweethearts + Golden Finger + Two Powerful Leads. (A sharp-tongued girl with incredible combat skills and a reclusive boy with a brilliant mind but no gift for words.)
The author is terrible at naming things. This isn't a wish-fulfillment story or a traditional monster-slaying, level-up tale. It focuses on everyday life and fighting monsters in dungeons.
In another world, strange sea creatures have emerged in force. Li Que, one of humanity's strongest fighters, bears the burden of saving the human race. When the army suffers a crushing defeat, she loses her beloved older brother. Luckily, she finds a way to undo it and start over, though this method turns out to have none of the power of a golden finger.
What do you mean, she has to bring along her fated person, who'll join her in this fight and stand by her unconditionally? What kind of lousy golden finger is this? How is she supposed to save Kepler without any cheats? Her life was ruined by all those powerful System novels. Fine, she'll just pick someone at random. Wait, she barely knows this guy, does she? Why is his opinion of her so high? Whatever. He's incredibly strong, so she'll bring him along. Having one more formidable ally can't hurt.
It was both long-planned and a reunion after a long separation. “What are you afraid of? Didn't you say I was your fated person?” He pinned her against the wall, not letting her escape.
Li Que stammered. The person who used to be her height was now towering over her, and her bravado faltered. “No, that's not what I meant by fated person.”
Li Que is a caged bird who longs for freedom and has a terminal case of chuunibyou. Everything she has seen and learned comes from books, so it takes her a long time to understand her own feelings.