I am a chaebol in South Korea - Chapter 258: Let Tara come

Dante was an ageless warlock who had been going from one battle to another for hundreds of years.Following a chaotic encounter with an evil god, Dante unintentionally activates a contract with a demon, thrusting him into the modern world.Resolved to live a peaceful life, his intentions are halted when he finds himself in the middle of a conflict among rival mafia factions—dabbling with the ominous demonic magic that he knows best.

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!?

Sam Sanderson is envied by many for his job, however he himself didn't seem to like it much.

Due to his expertise in nanotechnology he was tasked with monitoring the state the Valkyries, humanity's strongest weapons who all just happen to be made into gorgeous females.

Forbidden from even touching any of them, Sam spends his days in agony watching flowers he couldn't hope to touch. However one day all of that seemed to change.

Those Years I Opened a Zoo

Duan Jiaze, who was poor, inherited a private zoo after graduation, and was forced to download a “hooligan” APP called “Ling Xiao Hope Project”, which ushered in other “animals” such as Luya (golden crow), Daji (nine tailed fox), Bai Suzhen (white snake) and Black Bear. App will punish if he fails to complete its business-related tasks regularly.

In this way, Director Duan was like ”a duck driven onto a perch”, and began his journey of unifying the world’s demons while journeying on a road to be becoming famous.

- Description from Novelupdates