Sovereign of the Three Realms (WN) - Chapter 2357: Taiyuan Sky Palace

Yamagata Tatsumi and his family were traveling in their car when a wild truck smashed into their car. But wait! The MC wasn’t dead yet, his entire family was though. With his entire family dead and relatives abandoning him, the only one remaining by his side was his pet cockatiel. For a year he lived only with his pet, who had been with him since childhood. But finally, her lifespan reached its end and she died in his arms.

One day, Zhang Fan, a poor medical student, receives a medical system from the future. This turns him into a new shining star in the medical field. Along the way, he must face medical corruption, competition, and infighting from other doctors, and even find time for a love life as he strives for the top of the medical field!

- Description from Novelupdates

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

“Marry me, and you might not live to regret it.”Everyone in the city knew about him—a ruthless tycoon with a dark reputation. Whispers said he was cursed, having outlived four fiancées, each meeting a tragic end. When she became the fifth, forced by her own father to take her sister’s place in the marriage, the city waited for the inevitable. They were certain her body would be carried out of his mansion within a month.But to everyone’s shock, not only did she survive—she thrived. From a pawn in a deadly game, she rose to become the most formidable woman in the city, turning the tables on fate and rewriting her destiny.