Meanwhile, the remaining students—, Kenji , and Sora —discover a horrifying truth: the Yama Hime are not mindless predators. They are farming humans. In a series of disturbing double-page spreads, Volume 3 reveals a cavern beneath the village where half-transformed victims are strung up like ripening fruit. The visual here is pure body horror, reminiscent of Junji Ito ’s Uzumaki but with a unique ecological dread.

If you are looking for the original source material, the Yamahime no Mi manga was first published in 2002. Akebi no Mi (OAV) - Anime News Network

: Kouichi discovers his mother is involved in a secret, lust-driven relationship with his friend, Masaru .

Manga series often develop their stories through a combination of character development, plot progression, and world-building. Here are some aspects that might contribute to the deeper story in a volume like Vol. 3 of "Yama Hime no Mi":

: The volume highlights Kouichi's internal collapse. Once cheerful and kind, he becomes cynical and "lifeless," eventually deciding to move out of his home to escape the "disgusting" environment.