One Piece - I Am A Different Luffy! - Chapter 509 - 507 - Claiming another princess.

A world from another dimension suddenly appeared in the Milky Way galaxy and collided with the earth. A spatial collapse occurred, which allowed the monsters crossing over from the other side to invade various countries, and the earth fell into great calamity.

The military was powerless against the invasion because modern weapons didn't work against monsters from another world. Under the desperate situation, a god-like figure appeared and bestowed blessings upon the humans to awaken their power. From then on, the earth regained its hope, and these extraordinary people were called Realizers.

Tenku Okuihara is a five-year-old boy who dreams of becoming a Realizer to protect the world and his family. But an incident changed his life goal from a hero to a grim reaper.

A Miao’s first impression on the male protagonist: a psycho and pervert who always attempts to make physical contact with her through unrighteous means.

Shen Xinglan’s first impression on the female protagonist: dunno.
A Miao, a street burgler, ran into Shen Xinglan, a billionaire in S City. Who would’ve thought that they would start a beautiful, romantic love story with ups and downs?

Shen Xinglan came back from a kill-training base on a distant island and started a successful career as a businessman. Along with numerous incredible helpers, can he manage to resist the plots and schemes against his enemies in his family? Does he have more secrets? What’s the untold stories of A Miao’s mysterious background?
Join their journey!

- Description from Novelupdates

Julietta, born as an illegitimate child of a nobility, is raised in an opera theatre to hide away from the eyes of the noble’s main wife.

The End is finally here, but humans struggle and decide to fight to the bitter end and use all of their weapons. However, all of that was useless, and billions died.Until the first humans invaded the enemies' worlds and returned with powers after awakening them, they finally had the chance to fight back and defend their lands.Many years have passed, and humans have yet to obtain any real victories. Terry lost everything since the monsters and the overlords came to Earth, and he waited patiently and trained every day until he had the chance to awaken his power. Despite doing well on his first attack, Terry didn't awake any power...However, when he returned home, he confirmed that his power had indeed awakened... he could see weapons' status, and they could gain experience when he used them or killed monsters with them. Soon, he will come to realize that no other power is better than his!