Arc of Fire - Chapter 12: Through the Times of Yesterday

Being able to learn any skill immediately, and just by raising its proficiency, stand at the summit.

He is the World Chef Association Honorary Chairman, having the title of the World Chef God.

He is the greatest composer, pianist, and conductor after Beethoven and Mozart.

He also has the title of Underground Racing King, Fist King, Gambling King, Giant of the Stock Exchange Market, Arm of the Industries and King of the Skies.

He who has a miraculous learning ability and can stand at the apex of all things if he so wishes for it, the Omni Genius.

- Description from Novelupdates

Eren Idril died as an old, decrepit, and piss-poor adventurer by the maws of a D-Rank monster. He had a lot of unfulfilled dreams and desires that couldn't see the light of the day after the light in his own eyes died down.

But fortunately for him and unfortunately for the world, that wasn't his end. Eren was somehow dived back in time when he was a mere teen, attending Lionheart Academy for adventurers.

When life gives him a second chance, Eren decides to exploit it to its fullest. Experience his vile deeds as he partakes in them without feeling the slightest bit of hesitation.

A high-schooler who loves playing FPS games were reincarnated in the fantasy world. And usually, those who were isekaid were blessed with overpowered magic and a legendary beast. However, our main character is different.Instead of those things, he awakened a shop system where he could purchase American freedom! And since modern guns is as good as magic, he decided to make full use of this ability and make a name for himself in this new world.Fireball? Cute. My M203 grenade launcher makes a bigger boom.Summoned beast? That’s nice, I’ve got a UAV with thermal optics.You can split oceans with magic? Cool. I can erase cities with a nuke.Whatever overpowered spell you’ve got, I’ve got something better.

Amamiya Hiroto is unlucky. His life consisted of misfortune after misfortune, culminating in an unlucky death during an incident on a school boat trip, trying to save a girl he barely knew. After death, he met a god of reincarnation who requested that the hundred or so dead passengers—one of them being the girl he tried in vain to save—be reincarnated into another world.