I Will Live As An Actor - Chapter 82:

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

[Tenant: 002][Name: Reiko Onodera][Physical Strength: 5][Intelligence: 5][Charm: 9][Daily Rental Payment Required: 666 yen or role-play as a housewife daily (paid)][Daily Income Generated: 5,000 yen (settled)][Tenant Desire List:][1. Wishes to find a suitable job (X)][2. Hopes to bring her daughter to live together in Tokyo (X)][3. Has found a dependable person in Tokyo (accomplished)]…………Living in Tokyo, collecting rent while lying flat.The widow working part-time away from home, the heartbroken beauty who ran away from home... the tenants are all strange...

Yuanbao was born in ancient times, the only girl in three generations, the nickname is Jiaojiao, the big name is Bao, this is a proper script for the group favorite heroine.

However, Zhuangzi next door suddenly came to the young lady of the high official’s family in the city.

This young lady is a direct descendant, but her mother passed away early, her father continued, and the young lady was not welcomed, so she was sent out of the city.

“There is an ominous foreboding!”

Yuan Bao thought so.

“Little sister, you see how pitiful the little sister is, can’t you be a little sympathetic?”

A brother looked at the lady next door with pity on his face.

Yuanbao raised his hand and a pot lid flew over: “People are pitiful? They don’t have to worry about food and clothing, do they need you to be pitiful?”

“Good fight!”

Grandfather, grandmother, father, mother, many brothers, clapped their hands together.

A certain young lady is knowledgeable and reasonable, and said, “Being habitual is like killing a child. Your sister needs to be well educated!”

“roll!”

A brother stared directly, “My little sister is beautiful and kind, which one likes her?”

- Description from novelbuddy

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?