Oppai Gakuen Marching Band-bu!
Japanese title: おっぱい学園マーチングバンド部!
Type: OVA
Episodes: 1
Source: Visual novel
Genres: Hentai
Studios: T-Rex
Producers: Lune-Pictures
Duration: 27 min
Rating: Rx - Hentai

An average boy receives one day a special camera from a mysterious, massively-endowed girl in a bunny suit. This camera has the ability to make any girl photographed with it unbearably horny, deepening their erotic agony with each picture you take. And when the sexual tension finally boils over, the only way to quench these uniformed vixens' thirst is by having them service you with their enormous breasts!

(Source: J-List)