Seirei Tsukai no Blade Dance - Volume 15, Chapter 3 - The Distance between Sisters

It begins on the mountain.

With the glint of a knife, a flash of steel in the hands of a sworn brother. A betrayal.

Stabbed and pushed down the mountain, Zi Chen lied within the red-stained snow, left to die.

This is where it begins; he is given life by lightning,
baptized by thunder.

Those who had once betrayed him should all suffer in his cruel revenge.

- Description from Novelupdates

After five years, Ning Xi has returned and is out to take revenge on the sister who turned her parents against her, and the childhood sweetheart who betrayed her for her sister. She aims to fulfill her childhood dream and become a famous actress. However, her sister is still out to get her and she has to avoid all her underhanded schemes.

One day, after falling into one of her sister’s schemes, she meets an adorable little boy and saves him. His father then offers to repay her with his body: “Marry me.”

Ning Xi: ???!!!

Little boy: -sad puppy dog eyes-

Thus Ning Xi starts staying at the mute little boys’s house to help him come out of his shell… cue lots of comedy, some flirting, sweet moments between Ning Xi and little bun… and maybe big bun too.

Soldier King Li Qiang, who was part of the Special Forces ace army's Winged Dragon commandos, had accidentally broken the relationship between his fiancee and his adulterer and had lost his life because of this! Under the effects of the treasure, he was reborn as a normal high school student, and actually discovered that the school beauty, Lin Ya Shi, was the daughter of his fiancee and his adulterer. In order to take revenge on his enemy, he used the opportunity to get close to the Lin family while the school beauty was his bodyguard, but he discovered that a huge crisis was approaching everyone …

I’ve reincarnated as the reverse harem game’s villainess, the one and only step-daughter of the Eckart duke family.