Graffiti writers carry many weapons in their arsenal — spray paint, markers, etching paste, and stickers. For this series, we went out to document some of the stickers — hand-written ones, specifically — that are currently running on the streets of Manhattan, kicking off with KATSU (above). Check back every Friday for a new photo essay.

See the photos in the gallery above.

(Photos: Aymann Ismail/ANIMALNewYork)