Natsuyasumi.
Japanese title: ナツヤスミ.
Type: ONA
Episodes: 3
Source: Original
Genres: Boys Love, Hentai
Studios: Studio 9 Maiami
Producers: Studio Zealot, White Bear, Mediabank
Duration: 14 min per ep
Rating: Rx - Hentai

Yuu and Natsuki met in the hot sun, during that unforgettable summer vacation... Was it a dream, or...? It was a bittersweet love story?

(Source: AniDB)