A brief description of the manga Level 1 kara Hajimaru Shoukan Musou:
Shinobu Iijima lost his life along with his younger sister,
When he woke up, he was already reincarnated in the world of the game he was playing.
Shinobu is desperate to start the game from scratch after her adoptive father deleted her game data, but she learns that her little sister will soon be reincarnated in this world as well.
In order to stop his adoptive father from becoming a top player who is after his little sister’s body, he will embark on a path to the most painful one…!