Tangling with the Western Commander - Chapter 415 - 422

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

What would you do when you're faced with the ultimate being that is by true right Omnipotent, Omnipresent, and Omniscience?What would you do when that very being tells you it will give you anything you ever wanted?And what would you do when the ultimate being, devoid of greed, gives you the power to generate INFINITE MONEY?This is the story of a boy who gets reincarnated in a new world filled with countless possibilities and dangerous beings.Now, with the power to generate INFINITE MONEY in his hands, how will he survive in this world?Will he be used by everyone else around him....Or......will he buy them ALL?

High-school student Koremitsu Akagi finds himself attending the funeral of Hikaru Mikado, who had died in an accident during Golden Week. He’s not sure why he’s there, as he only exchanged a few words with Hikaru at school. However, Hikaru doesn’t seem to be completely gone from the world, as he comes back as a ghost in order to fulfill a promise to Aoi Saotome, his fiancée. Since Koremitsu is the only one who can see him, he asks him to carry out his promise in his place.

Complying with his request, Koremitsu tries to fulfill Hikaru’s promises to the rest of his “girlfriends”, helping them overcome past misunderstandings and repair broken relationships.