Tomodachi no Imouto ga Ore ni Dake Uzai - Volume 1, Chapter 7: Only Iroha, Ozu, Sumire, and I are annoying towards Mashiro

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Kaine didn't have the best life on earth: no friends, no family, no lover.

The only thing that he liked was the novel he read daily, “Descent of the Heavenly Demon”.

But what was Kaine's reaction when an astral entity told him that he died in his sleep and that he would be reincarnated somewhere with a system.

As you guessed it, he is now in the world of the novel he read with all the information he needs to live a good life.

But...

[Anger issues detected, rewarding accordingly]

“What do you mean anger issues?”

[Hatred System activated.]

……………………………………………………………

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Five years ago, she replaced her twin sister to marry him who was burned beyond recognition and even became a eunuch. Five years later, when they met again, he pressed her against the wall in the corner A low voice sounded with doubt. "Is your daughter mine? " The corners of her mouth curled into a sneer. "Are you sure you have the ability to do that? " His originally cold face instantly turned into the darkness before the storm His voice was fierce and low as he growled, "woman, you are challenging me! "

She is a top-class spy, a poison specialist, but also a young and cute girl with a sinister temperament. In spite of her sweet and innocent appearance, she can complete any tasks without the slightest hesitation. One day because of an incomplete black magic, she was sent into the body of a girl who was deemed as a good-for-nothing. What kind of change will she bring to this continent?

In 2036, humankind steps foot on Mars for the first time.