Reiko Saionji from P. S. C. Sennyuu sousa-kan Reiko (P. S. C Undercover Investigator Reiko) hentai manga by Sunagawa Tara. Mostly monochrome material but some colored art exists too. Her main outfit is the black leather cat suit with long loose hair while she rocked a ponytail during a flashback scene

Trigger words and basic look

psc_reiko_saionji, long hair, black hair, hair blue highlight, red eyes,

Main outfit

black leather cat suit, choker, cleavage, navel, toned body,

Optional

ponytail, katana