Kansen: Inyoku no Rensa
Japanese title: 感染 淫欲の連鎖
Type: OVA
Episodes: 2
Source: Visual novel
Genres: Hentai
Studios: Suzuki Mirano
Duration: 28 min per ep
Rating: Rx - Hentai

Extracurricular club activities are the norm for Japanese schools, but an all-night movie event scheduled at school and in August still sounds strange/unusual, especially considering the tiny size of the Movie Research Club (merely six students). And indeed, the two teachers supporting this novelty have hidden motives/objectives, although also the six students themselves chose to participate in the event for personal/secret reasons...

(Source: Forum post by Baldo)