Bleach : I Pick Up Attributes in Seireitei

Hasumi Ren crossed over to the Soul Society five years ago, landing right in the most dangerous era—the time when Aizen Sosuke was still a Vice-Captain, plotting in the shadows. Armed with a mysterious Attribute Collection System, Hasumi Ren can see and absorb "Experience Fragments" that drop from others. Watch Shiba Kaien release his spiritual pressure? [Reiatsu +200] Train with Shihoin Yoruichi? [Shunpo +100] Argue with Urahara Kisuke? [Intelligence +50] His plan was simple: Stay low-key, open a chain of Ichiraku Ramen shops in the Rukongai, and quietly farm attributes until he was invincible. He wanted a peaceful life, hiding his true power while playing the role of a lazy student at the Shino Academy alongside Ise Nanao. But in the Soul Society, talent is a curse. When a Menos Grande attacks during a training exercise, Hasumi Ren is forced to draw his sword. His Zanpakuto, Garenge (Chain Lotus), awakens with the terrifying ability to analyze and seal the powers of others. Now, he has caught the eye of the Stealth Force Commander Shihoin Yoruichi, provoked the corrupt Tsunayashiro Noble Family, and worst of all... he has appeared on Aizen’s radar. To survive the coming storm, Hasumi Ren must evolve. From a student to a seated officer, from a businessman to a Captain—his path to the top is paved with the dropped attributes of his enemies. — Description from novelcodex.org