A Necromancer Who Just Wants to Plant Trees - Chapter 830 - : Origin, The Legend of the Death Fear Graveyard!

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

Chiyuki Hoshino, a beautiful otaku girl, traveled to the world of Yu-Gi-Oh! with her Fate/Grand Order Heroic Spirit deck.“Blue-Eyes White Dragon!”“Activate the effect of Arash! Stella!”“My most loyal servant, the Dark Magician!”“Activate the effect of Arash! Stella!”“I…”“Activate the effect of Arash! Stella!!!”Amid the ruins and countless corpses (thanks to Arash), Chiyuki wiped her forehead and smiled brightly. “Playing cards is so damn interesting.”For those interested in reading this fanfic, please note that I am not the original author. I have only translated and edited it to make it as readable as possible.