Keisatsu 3 Kyoudai wa Furyou Shoujo ni Amasugiru

Homura Kurose is a hard-core delinquent girl. When her mother decided to go abroad, Homura was sent to live with a family friend who had three boys in the house, all police officers! Homura felt wary. After all, policemen were supposed to be the natural enemies of delinquents! But these three brothers all kindly doted on Homura...?

Her sweet over-protective reverse-harem cohabitation surveillance life is about to begin!

(Source: Square Enix, translated)

Notes:
- Originally published as a one-shot, was then picked up for serialization.
- Includes one extra chapter.