MTL - Rebirth Turn of the Century - ~ : Plot description

Xia Yan passed through to the world of Bleach and became an eleven-year-old boy. He was rescued by Renji and Rukia in the Seireitei, and he was studying at Shin’ō Academy, and he was a student of the same class.
He is a top student of the Shin’ō Academy, and he is vying for strength by various teams. In the end, he has entered the first team of secret mobile maneuvers.
He will use punishment to kill every person who tries to threaten the martyrdom and protect his loved one.

- Description from Novelupdates

A story in which a woman, after learning that the world would end in ten days, sets out to finish one last thing: murder her ex-girlfriend.

However, she ends up befriending, and spending the world’s final days with, the little sister of her ex-girlfriend instead.

The world is like a chessboard and all living beings are the pieces on it!

“I do not want to be treated as a chess piece by the players!”

Defeat in this chess is tantamount to the destruction of my body and I’ll thoroughly disappear! Victory in this chess and I’ll have a very long life!

With the help of an ancient Weiqi piece, Gu Hai arrived at the Divine Province Mainland!

Heavenly Dao is eternal, however life is limited, making heaven and earth pieces of a chessboard, then in the end transformed into a loess, vanishing like faded smoke and scattered clouds. Nevertheless people still jump out of the chessboard, and these people are already prepared for their death while playing chess against the heavens, and perhaps win eternal life for themselves?

“I’ve come, and I want to live through 10,000 lives without any boundaries!”

- Description from Novelupdates

Police officer, would you believe me if I say this is an Iyashikei game?