One Piece: God of Space - Chapter 16 The revolutionary army appears

In the era of universal mechas, people can go to the endless abyss, collect materials, strengthen and forge their own mechas, and master the power of destroying the world.

Jiang Chen traveled through time and awakened his talent [Immortal Unarmed]. Once the mecha is broken, he can permanently absorb its power and receive multiple bonuses.

…

At the bottom of the abyss, when the Old Demon God finally broke the Titan mecha with great effort, a hand stretched out from the fragments and held down its head.

“Congratulations, you have unlocked my limiter.”

- Description from novelbuddy

Zhou Youlin, a famous ice queen of the special forces. During an accident in her mission, she was betrayed by her squad mates and was shot twice. She died on the spot. When she woke up again, she became the useless madam of a rice family and was a resentful wife who was neglected by her husband. Her son, too, was neglected.“If I’m not mistaken, we’re already divorced. You’re currently invading my home, my dear ex.” Zhao Youlin raised her chin and sat at the end of the couch with her legs folded. She looked prideful.Mu Tingfeng was expressionless. “We can get married again.”Zhou Youlin quirked her eyebrows. Then, she swung her hand, and a large number of handsome men’s pictures were spread on the table.“Baby, be a good boy and choose someone you like to be your stepdaddy, okay?”Mu Tingfeng’s expression… turned dark.

A mysterious natural phenomenon caused the Earth to be plunged into darkness. The world turned into an endless bloody chaos and mankind is on the brink of extinction…

Failing in his job hunting, Sanada Kyouichirou was hopeless in this society. When kyouichirou had thrown himself towards the bottom of a cliff. When he woke up his body had returned towards when he was in fifth grade of elementary school. He did not want to have any regrets in this life so he had decided on building up an harem in this second life.

The elder sister that he admired, a senior and president of the student council at a school for rich young girls, a strong minded upper classman at school. The poison fang of Kyouichirou who had pretended to be a innocent child attacks those girls.