Hotaruko
English title: Crimson Climax
Japanese title: 螢子
Type: OVA
Episodes: 3
Source: Visual novel
Genres: Hentai
Studios: Arms
Producers: Green Bunny
Duration: 30 min per ep
Rating: Rx - Hentai

Lured to a cursed island by a carnal cult, victims are brought to the throes of ecstasy, then brutally sacrificed in a bloody occult ritual. When sexy Ryo visits her late mother's island home, she's in for a terrifying surprise. Can she escape with her life and her virtue intact.

(Source: ANN)