Longevity Begins with Marrying a Wife - Chapter 300: happy event

Chen Rui, an otaku from earth, is reborn into a human body in another world, who falls into the legendary evil, brutal world of the devil called Mozu where humans are treated as food. He has to survive while facing horrors of the devil, violent dragons and a variety of power enemies depending on a strange super system chip and his wits. Surrounded by Devil’s beauties such as black-bellied lolita princess, cold queens, violent dragons, charming poisonous devils …

Wanting to live in the Devil’s world is hard! Wanting to live in the Devil’s world as a human is harder! Wanting a human to be the devil’s son-in-law is hardest!

Let us see how a small otaku uses power and strategy step by step starting from an ordinary human to writing a legend as the devil’s greatest son-in-law.

- Description from Novelupdates

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

Raised by a league of assassins and trained for thirteen years, Shan Yue was seventeen when she took the throne of best assassin, becoming an untouchable legend amongst assassins.

Despite being legendary, she put her faith in the wrong people and was killed by her own league’s betrayal. However, while Shan Yue thought her death was assured in the violent explosion, she was surprised to find herself reincarnating into the body of a useless female student.

Forget how pudgy and dim-witted she was — she seemed to get into fights every day! Her original body’s sister sneered, “Fatso! All you do is eat… and look at how ugly you are! You really embarrass me!”

Fat? Ugly! Shan Yue started a daily training regiment, rapidly slimming down and becoming a ravishing beauty! Her original body’s mother snapped at her, “How did I give birth to a child as stupid as you?! Always last place in school — you embarrass me!

I should have strangled you right after I gave birth to you!” Stupid?

Last place in school? Shan Yue lifted a finger, and the principal of the top school in the capital personally visited, offering a transfer to his school. Elite hackers, doctors, mercenaries, math geniuses…

All of them were now vying for her attention! Though she managed to get the chance to become normal after going through so much, she accidentally become a big shot again, even finding herself a two-faced bigwig for a husband! Shan Yue: I just wanted a quiet life, but my abilities prevent that. Sigh…

Zhang Ming has obtained the god-level anti-sign-in system, which can disguise the Holy Land, attract others to sign in, and draw 90% of the reward.

【Ding! Zhanhong, the son of planes, checks in at your Sword of Swords of Immortals (pseudo), and you get the Secret Scroll of the Heavenly Book·True]

【Ding! Daoist Qingquan, the illegitimate son of the plane, checks in at your ginseng orchard (pseudo), and you get Xisui Dan × 90%]

【Ding! The transmigrator Wang Hong signs in at your Tianshi Mansion (pseudo), and you get Tianshidu·True]

【Ding! The reincarnator, Chu Fan, checks in at your Nine Dragons Coffin (pseudo), and you get the Desolate Holy Body × 90%]

【Ding! The reborn Ye Xiaoxuan checks in at your Miaomu Mountain (pseudo), you get the immortal mode × 90%]

【Ding! The extraterritorial demon Wang Zanghai checks in at your lock demon tower (pseudo), and you get the water spirit bead·true]

【…】

“Young man, you have to pay taxes when you sign in, you know?”

(Book Friends Group: 710233203)

- Description from novelbuddy