I bound the blue dye

My name is Yu Mikami, and I’m a first-year student at the Shinō Academy of Spiritual Arts in Soul Society.
I have a friend who will be a little famous in Soul Society in the future, his name is Aizen Sosuke.
Unlike this ambitious friend with lofty ideals, my goal is very simple. Through hard work and diligence, I will become the chief officer of the Gotei 13 after graduation, and from then on I will become a samurai and live a life of lying down and sucking blood.
Until one day, a thing called “cultivation binding system” suddenly appeared.
Whenever Aizen improves his strength, my strength will automatically synchronize to the same level as Aizen.
Then, it is very clear what to do in the future.
“Sosuke, you have to work hard. As long as you work hard enough, I can live the life I want!”