So this is basically Sadako from the Ring / Ringu, only you get to fuck her into submission? That sounds kinda hot. Bitch always gave me nightmares; time to repay the favor.
She is actually not Sadako, she is supposed to be a different kind of japanese folklore ghost, she called oppou san or something like that because she apparently only makes that sound, she is pretty popular with many hentai and mangas featuring various renditions of her, usually with a shota or very short man, togheter with the woman with the split face and the teketeke she is probably one of the most popular proper folklore ghost girls, oh and Hanako of the toilet.
this type of games made me wish some japanese dev made an harem game where we fucked all the japanese folklore ghost ladies
There are many hentai series about it but not games as far as I know, there are some that have parodies of Sadako but she technically is not folklore, she is more pop culture, this one and Hanako are proper folklore, still that would be cool if well made.
edit: I forgot to ask where does the group sex tag come from? are there other dudes? more ghosts?