Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 4 - 4-2. Little Girls Shopping

Zhou Wang, who graduated from college and didn't know where to go, accidentally opened the “Game of Life” system while playing games, and since then life has become a simple model. We can't go back in time, but we can always change our way of living. Grow up in relaxation and move forward in liberation. …… Zhou Wang: “This time, Lao Tzu is only a winner.”

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.

In the general’s house, the eldest daughter is born again.

In the last life, she mistakenly regarded the fish as a pearl and misunderstood the wolf.

In this world, she wants to expose the stepmother’s Buddha-snake heart and tear the sister’s hypocritical face.

This life, let me see how she protects her parents, keeps younger brothers, fights stepmothers and step on stepsisters.

Who will harm/betray her, she will return back a hundred times more, conspiracy against conspiracy to eliminate all! I want to stay away from the royal family, never want to become the imperial concubine, yet unexpectedly I can’t escape from his love net!

- Description from Novelupdates

I have a childhood friend.