The Daily Life of the Inventor in Another World (R18) - Chapter 12: Diamond Core Heart (3)

The end of all worlds approaches.

The Demon King Order harvests lives from all manners of living beings.

Within this darkness full of despair,
A single person escaped from space-time, returned to before the world collapsed, determined to change the fate of the past.

But as time pass, he gradually finds out that the Apocalypse isn’t quite as simple as he thinks…

Regressor, Reincarnator, Possessor, Traveler, or Predestined. I will hunt down the protagonists that exist in the countless worlds and absorb their abilities.

Here lies the protagonist.

The continent’s hope.
The hero who will save the world.
The hero who currently has a hole through his chest!

With the Spirit of Earth, freed the Dwarfs and gained their trust.
Purified the contaminated Forest of Spirits and became the Fairies’ benefactor.
Resealed the Ancient Stone statues found in one of the ruins.
Exterminated the giant sea serpent that emerged from the sea.
Defeated the 47th Demon Lord of the underworld…

“Aside from assaults and murders there were other death related incidents as well as vandalism, arson, and etc…”

“S-spare me…”

Psh!

This was the protagonist.
But now he has died by my hands.

In The Swordsman, I am Yue Buqun! In Legend of the Condor Heroes, I am Ouyang Feng! In Tianlong Babu, I am Ding Chunqiu! …In Datang Shuanglong, I am Shi Zhixuan! …I am me, a big villain boss who walks in the heavens!

 Swordsman, The Legend of the Condor Heroes, The Eight Parts of the Dragon, Little Li Feidao, The Legend of Double Dragons of the Tang Dynasty, Fengyun, Zhuxian, Yangshen, Shading the Sky, Perfect World, Eternal Life…

- Description from novelbuddy

High-school student Koremitsu Akagi finds himself attending the funeral of Hikaru Mikado, who had died in an accident during Golden Week. He’s not sure why he’s there, as he only exchanged a few words with Hikaru at school. However, Hikaru doesn’t seem to be completely gone from the world, as he comes back as a ghost in order to fulfill a promise to Aoi Saotome, his fiancée. Since Koremitsu is the only one who can see him, he asks him to carry out his promise in his place.

Complying with his request, Koremitsu tries to fulfill Hikaru’s promises to the rest of his “girlfriends”, helping them overcome past misunderstandings and repair broken relationships.