The Day I Became a God

They say whatever doesn’t kill you makes you stronger, but that’s not the case for the world’s weakest hunter Sung Jinwoo. After being brutally slaughtered by monsters in a high-ranking dungeon, Jinwoo came back with the System, a program only he could see, that’s leveling him up in every way. Now, he’s inspired to discover the secrets behind his powers and the dungeon that spawned them.

After discovering that he’s the son of Satan, a young man must join the True Cross Academy in order to master his abilities and defeat Satan himself.

In the year 1711, a group of alchemists are granted an elixir of immortality, with the stipulation that they must kill each other until there can be only one. The now-immortal group unanimously decides it wasn't worth it and destroy the elixir; but one of them, Slizard Quates, starts to kill off his fellow immortals. To reduce the risk of Quates tracking them all down, the group separates and goes their separate ways. Neither of them crosses paths again till 1930, Manhattan, when Quates manages to create a new elixir of immortality. However, he loses it and it ends up going around town, taken to be a bottle of alcohol and unknowingly drunk by many residents. The drinkers of this new elixir include Isaac and Miria, an eccentric pair of thieves; the Gandor brothers, a Mafia family; and their associates in the Camorra, the Martillos (who employ some of the original immortals). Now, not only are a new group of immortals created, but the simmering criminal underworld is about to explode.

Raku Ichijou is an average high school student. He also happens to be the sole heir to the head of a Yakuza Family called the Shuei-gumi. Ten years ago, Raku made a promise... a secret promise with a girl he met. They promised one another that they will "get married when they reunite." Since then, Raku never let go of the pendant the girl gave him. Then one day, a beautiful girl named Chitoge Kirisaki transfers into Raku's class. Their chemistry was more than off. There was not a moment where they were not fighting. But by a weird turn of events, Raku and Chitoge agree to become fake lovers. Although his heart is really interested in his classmate Kosaki Onodera, Raku must continue pretending to be Chitoge's boyfriend.

War for the Holy Grail - Pursuing the power of the "Holy Grail" which grants a miracle, this is a contest in which seven mages summon seven Heroic Spirits to compete for it. In the battle whose conclusion was postponed three times, now, the fourth war commences. Amongst the mages, there was a man who was always alone, and could not find out the meaning behind his life. His name was Kirei Kotomine. Not comprehending the guidance of fate, Kirei was lost, and had kept questioning why someone like him was given the Command Seals. However, a nemesis crossed Kirei's path. That person is - Kiritsugu Emiya. A merciless mage killer and assassin-for-hire who sought the miracle of the Holy Grail on behalf of his wife's family - the Einzberns. Merely recited in fragments in Fate/stay night, this is the Fourth Holy Grail War that took place 10 years prior. The truth that unfolded behind the battle between Shirou's foster father, Rin's father, and the younger Kirei Kotomine, is finally revealed.

Satoru Fujinuma can travel back in time to save others' lives. When he wakes up 18 years in the past, he has a chance to save his murdered classmates.