I have Immortality In The Cultivation World - Chapter 1 - : Longevity Dao Fruit

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.

Year 2056, in a city in the Yuan Jiang Su Jin area. On top of a ruined, shattered six story residential apartment sits a teenager wearing a combat vest, militaristic trousers, and alloyed battle boots. On his back is a hexagonal shield and equipped is a blood-shadow battle knife. He sits there silently on the edge of the roof. At this time, the sparkling sky was shining and there was a refreshing breath within the air that blew towards him. However, there was only silence within the ruined, deserted city, with an occasional howl that makes your heart skip a beat.

- Description from novelupdates

After 50 years of being in the position of Hwacheon Clan Leader, Kang-hyuk, widely renowned as 'The Dragon' retires.

He is the heir of Di Hao Group; decisive, cold-blooded yet dotes on his wife a little too much.

“Husband, I think I want to rear a pet. What do you think we should rear?”

“Rear you.”

“Husband, I want to change bed sheets. Which material do you think is the most comfortable to sleep on?”

“You.”

“………”

Zhuang Nai Nai: Can’t he speak properly for once?

One day, somebody asked the man, “Why are you always the first one to bow your head every time you two fight?”

Si Zheng Ting: “I am 185 cm, she is 165 cm. Of course I have to bow down to speak to her.”

To put it short, this is a story about a black-belly president, his wife and their effort to conceive children after marriage.

- Description from Novelupdates