Bleach: My Years as Captain-Commander

Transmigrated into the world of Bleach.

He becomes the eldest young master of the Kuchiki Clan, the foremost of Soul Society's Four Great Noble Clans, and has a bratty little brother, Byakuya Kuchiki, who's determined to surpass him.

The future king of swagger, Aizen; the Wandenreich; Tsunayashiro Tokinada...

All these overpowered players are swords hanging over his head.

In response,

Kuchiki Chiya says the pressure is immense.

Luckily, he awakens a System that makes him stronger by enjoying life. As long as he enjoys himself, his strength can grow without limit!

After a hundred drunken nights in the red-light district, you awaken the sharpest Zanpakuto: Heavenly Severance of All Things!

After watching Hisana dance, your Kido breaks through its limits and you master the forbidden art: Yin-Yang Wind Curse!

You build your own pool of wine and forest of meat, earning the reward: Thousand-Armed God-Slayer!

From then on,

Katen Kyokotsu: shattered with a single sword strike!

The Wandenreich? A bunch of nobodies waiting to be slaughtered!

Tsunayashiro Tokinada...

Nothing special!

There's only one genius in this era, and that's me, the greatest captain of all time, Kuchiki Chiya!