MTL - Quest Master of Konoha - Chapter 312 change maker

In the Toaru Kagaku no Choudenjihou (Railgun) SS series:

Set in Liberal Arts City between September 3rd to 10th, Academy City is having an exchange program with the rest of the world that allows some students to travel for this week to other places, and some students are allowed into Academy City during this time.

V.2 – Shopping Mall Demonstration

Setin Russia where Misaka Mikoto takes part in a demonstration things don’t pan as scheduled as Mikoto meets the mysterious New Light.

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The story was released in parts on limited edition DVDs and Blu-rays of the Toaru Majutsu no Index anime. The story consists of eight parts, and can easily equate to a regular Index novel in length.

An ultimate warrior, the one and only Alchemy Emperor, Ling Han, died in his quest to achieve godhood. Ten thousands years later, he, with the ‘Invincible Heaven Scroll’, was reborn in the body of a young man with the same name. From then on, winds and clouds moved as he set himself against the uncountable geniuses of this new era. His path of becoming a legend has begun once more. Of all eras underneath the heavens, I am the strongest!

- Description from Novelupdates

Sometimes. You face a choice in your life

“Choose. Between the two of them. Whom will you save, Michael Aroa?”

You look back into your life and wonder how you ended up here

“Michael please!! Save your mother!! Not me. Michael you don’t need to make a choice here!! Michael! I love you! I won’t hate you for your choices!! Please save your mother!!”

You question the path that you took that brought you to this point

“Son. She is your wife! She has your child. It’s not one life over another but two over one. I am already old but she has a long life. You are smart enough to make the right decision, Son, aren’t you?”

Since it hurts, you wish you could stop time and have some time to think

[Activating Ability: Temporal Pause!!]

[Activation failed!! Not enough Energy!!]

You wish to go back into the past and change everything that led you to here

[Activating Ability: Time Reverse!!]

[Activation Failed!! You don’t have the Requirements to use this ability!!]

And then when nothing works as it shouldn’t.

[Are you sure you want to use this ability?]

You make a decision that you had never thought you would

[Activating ability!]

And then... Chaos ensues

[Ability Activated]

[God Power: Time Collapse]

Following a brutal and tortured death, a former assassin, known only by his codename Kuro, is given the opportunity to reincarnate in another world, a world with magic and monsters. Armed with an unrivaled healing factor and an inhumane pain threshold, Kuro opts to go for a reckless direct approach in this world instead of a stealthy and cautious one, and as a result, slowly gains attention bit by bit.

Having previously been a loner in his old life, he interacts and befriends people for the first time in his existence, however, his blunt nature also sees him making just as many enemies, both big and small. By combining his old assassin skills with the magic powers of this world, along with his high resistance to pain and rapid regeneration, he doesn't take long to establish himself as a formidable force in this world.

Initially, Kuro only faces minor threats, like weaker monsters and bandits. But before too long, the threats slowly but surely become more and more severe…from Zombies to a bloodthirsty empire to Vampires and Demons, and even divine beings…however, as the enemies he faces grow stronger, so does Kuro, gaining rare powers that have never or rarely ever been seen in this world…