I Survived in Anbu to Become Super Kage

Yako appeared in the top-floor restroom of Konoha Hospital, looking grim.

He had used the Mayfly Technique to travel all the way up here... from the sewers.

'Damn it, how did I end up as the Sewer God of War? Is there really no more dignified way to infiltrate a place?'

The sewers were rich in organic matter. Recklessly discharging it into natural water bodies would cause eutrophication in the lakes and rivers.

Disgusting as they were, the sewers were undeniably useful.

Exchanging intelligence with Tsunade required absolute secrecy; he couldn't afford to expose himself.

Late into the night, Tsunade finished her work, closed her office door, and headed toward the stairs.

Passing the restroom, she suddenly paused, then turned and walked inside.

She had caught a glimpse of a figure out of the corner of her eye.