To My Dear Mr. Huo - Chapter 880 - I will take this as a compliment

A supreme expert in the Immortal World had died, and a strand of his soul returned to its original body on Earth. Tang Xiu discovered with amazement that ten thousand years passed in the Immortal World, yet only a single year passed on Earth.

Ruthlessly betrayed by his lover and trusted friends, Tang Xiu found that his soul went back to his previous body on Earth, and, despite he spent 10,000 years in the Immortal World, just a year has passed on Earth and many things have changed. Having an unsurpassed knowledge, Tang Xiu will protect his loved ones and go back to the Immortal World to take his revenge.

- 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!?

Terrorized by the Seed Crystal Virus outbreak, the dimension where Stein was created had its civilization destroyed. Once a world developed with technology as its core, now it was just a wilderness with remnants of tech that’s inedible.

Unknown if it was a call of good or bad luck, Zhang Qin Feng was chosen as the one to bring life back to this lawless, desolated place.

What can he do?

How can it be done?

For what purposes?

Is it worth risking his life for?

There’s no one to answer Zhang Qin Feng, as he was the only one with such a privilege. But he knew... That everything came with a price.

“STEIN, Inventory!” Zhang Qin Feng grabbed the Phalanx X-02 that took four inventory spaces from his Dimensional Storage. Holding the pistol with both of his hands, he fired a shot accurately at one of the incoming zombie's head.

Jun Xie was the number one assassin in modern earth. His skills and knowledge in the field of assassination were unparalleled, his accomplishments unprecedented, his reputation terrified the entire underworld. However, during a mission to retrieve a mystical treasure, a mishap occurred…

He is now Jun Moxie, a sixteen year old super level debauchee, sole heir to the declining Jun family. A family of valiant heroes, left with an old grandpa, a crippled uncle and a debauchee as the sole heir! Accepting the world’s criticism and cold stares with a smile, his new journey begins! His life will be carved by his own will! Rise to the top! Evil Monarch Jun Xie!

“This cup I toast to those I’ve killed in my past life. Forgive me, for there is no chance for you to have revenge. Gulp!

This cup I toast to those whose life I will take in my new life. Forgive me, for you are fated to die by my hands. Cheers!”