- Parodies: Original hentai
- Categories: Doujinshi
- Tags: Original, Inago, Doujinshi, Group, Sole female, Lolicon, Double penetration, Sex toys, Multi-work series, Ponytail, Japanese, Uncensored hentai manga, Hentai haven, Comics porn, Best hentai manga, Hentai porn comics
- Artists: Inago
- Languages: Japanese hentai
Hentai: Natsuyasumi no Jiyuu Kenkyuu 4
