Bakuhatsu Sunzen!! Tenshi no Countdown
English title: Countdown to Delight
Japanese title: 爆発寸前!! 天使のカウントダウン
Alternative titles: Baku Hatsu, Kitty Pleasure Pack #2 (1)
Type: OVA
Source: Manga
Episodes: 1
Status: Finished Airing
Aired: Oct 25, 2001
Duration: 29 min
Rating: Rx - Hentai
Studios: Sonsan Kikaku
Producers: Shinyusha
Licensors: Media Blasters
Genres: Comedy, Hentai

Motoki is a junior-high student who can't ever concentrate on homework because of his sisters loud lesbian sex in the other rooms, he doesn't think life can get much worse.....until he gets a tutor and falls in love with her, from which he becomes a sex slave for her.

(Source: ANN)