One Piece: King of the World - Chapter 246: I Found My Organization!

The dominant forensic doctor who traveled back in time to the era of the Great Tang's Zhenguan reign, became a distinguished family's abandoned girl.

[The world dies, and everything returns to its ruins. 】

Su Yu’s soul traveled to Shuilanxing, and once again encountered the survival event of collectively crossing to the sea of ​​returning ruins, so he had two talents at the beginning.

[SSS level insight talent]

Talent introduction: Insight into all things, spy on more secret information.

[Double Happiness for Unknown Talents] – Upgradable

Talent introduction: Open the treasure chest to get double resources, and the upgrade conditions are unknown.

Note: Special treasure chests need to complete the treasure chest test to get double rewards.

 …

- Description from novelbuddy

In regards to the MMORPG Cross Reverie, Sakamoto Takuma boasted an overwhelming strength that was enough for him to be called the Demon King by the other players. One day, he gets summoned to another world with his appearance in the game. There, there are two people that insist “I am the real summon master.” Takuma gets slave-turning magic used for summoned beasts cast on him by the girls –

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.