Strongest Survival by Otome Game’s Heroine (LN) - Chapter Volume 2 3: The Days of Training

An average man is reincarnated in the world of DxD! How do you survive in a world of battle-hungry monsters? With a cheat skill, of course! Devour the competition, becoming stronger with every fight! From the depths of the Familiar Forest, the Beast King will rise. (Harem, Gamer!SI)

“Why did you have to get married to me then if you knew you were going to throw me away!” She yelled.He exhaled gently and faced her, his face blank, his eyes surprisingly cool.“That's because, I had to save my crown and my throne. Now, let me live my life.”“Why did it have to be me?” She palmed her face.“You know she's my fated mate and there's nothing I can do about it.”With tears in her eyes, she slowly picked up herself and nodded.“I'll sign the divorce papers.”•••Nyx is torn with grief, when Alpha Oberon, her husband decides to divorce her after he claims to have found his fated mate.She leaves the pack out of the fear of returning back to her abusive and cruel parents and raises her child all by herself.Years race by, with the new Luna not being able to produce any heir for the kingdom. A seer tells the king that he has a heir who has the king's blood running in his veins.What happens when he realises the child is from the very woman who once offended? What will he to do convince her to come back in order to save his throne and kingdom?

Travel to the world of One Piece?

They come, the security;

Became Don Quixote Rossindi?

Forget it, it can’t be reopened;

But after realizing that he had eaten the fruit of silence, the little boy became restless.

Fruit of Silence, this is one of the devil fruits that can compete for the title of “the most useless” in the world of One Piece; it is only a little better than Chopper’s “Everyone’s Fruit · Common People’s Form”!

“Dover, you said you are a devil fruit wholesaler, why do your family eat all kinds of weird ones?”

Facing the bewildered little Dover, Rossindi patted his forehead.

“Forget it, let’s practice domineering hard.”

- Description from novelbuddy