The Old Baseball Player System - Chapter 54: Arrival

She was an illegitimate daughter in a wealthy family, with a lowly status. By chance, she discovered that her ex-boyfriend had sold her out. In order to hide, she accidentally injured him and fled in a panic. From then on, they were bound by an inextricable bond...

After being transported to this world, Nara Kazuki discovered that as long as he grinded enough proficiency, his jutsu could level up.And so, he began walking a very... peculiar ninja path.

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

[WARNING:FOR MATURE AUDIENCES ONLY]This is the story of how I made my own harem with the help of my step-sister.Anyway read 3 chapters yourself than decide yourself, if you wanna go further!!