Shocking Venomous Consort: Frivolous Miss - Chapter 1154

Lived for the sword, died for the sword.

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

I fell into a game world out of nowhere with an instant kill skill.
And then somehow, I became a bigshot.

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.