Imperator: Resurrection of an Empire - Chapter 1: Prologue part

Yi Feng, who was terminally ill, was reborn in the year 2000. In that year, his childhood sweetheart and school beauty Gu Muxi turned 18.“Yi Feng, lend me a pen!”“…Didn’t you just borrow one yesterday?”“Yesterday was yesterday, today is today, things change, don’t you understand?”“…I’m convinced, alright, here you go.”“Yi Feng, tear off a piece of paper for me to use!”“…Why tear mine? Don’t you have any?”“I do, but I don’t mind tearing yours.”“…You really have a way of thinking! Fine, fine, here you go.”“Yi Feng…”“…What do you want to borrow now? I don’t have anything left.”“Hmph, lend me your hand for a moment!”“…What for?!”“Nothing much, I just want to hold my boyfriend’s hand.”“Huh???”This is the daily life of a romance between childhood friends, filled with social awkwardness.A story full of sweetness, without any melodrama or heartache.Welcome aboard!~

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

There are always four kinds of people in the traditional Mary Sue world. The Male Lead, the Mary Sue female lead, the woman who never wanted to see the female protagonist live a good life, and the infatuated man willing to destroy heaven and earth to get the female lead.