Ancestral Lineage - Chapter 54: Phase 2. Evolution (1).

Daiki Tsukasa transmigrates to a world of everyday anime crossovers.At the start, he purchases a Special-Grade Cursed Object, activating the Great Collector System.As long as he collects valuable items, he can receive rewards.『 Congratulations, host, for collecting the Special-Grade Cursed Object — Sukuna's Finger. Reward: Innate Domain — Malevolent Shrine! 』『 Congratulations, host, for collecting the Yukinoshita Family. Triggered Triple Bond. Reward: Immortal Dual Cultivation Technique! 』...Miku Nakano: I was here first! Get lost, you vixen!Yukino Yukinoshita: Could you stay away from my sister?!Iroha Isshiki: Senpai! You won't abandon your cute kōhai, right?۞۞۞T/N: Be advised that characters and powers will be used, but not necessarily in the exact order, logic, manner, or arrangement that occurs in the original. Some stories will obviously be changed to fit into this mixed world with so many characters.

The first great emperor in the world was betrayed by his confidante and perished. Millions of years later, the great emperor’s soul returned and was reborn as Ye Yan, the son-in-law who was kicked out by the Chu family with a letter of divorce, restarting the supreme journey. Open the gate of immortality, kill the Jiuzhongtian, and cast an invincible name again!

- Description from novelbuddy

She is a two-faced and fierce hidden ghost doctor,

After experiencing heartbreak from being abandoned, he enlisted in the military.

And then, he became a war hero.