NTR Netorare Gakuen Hakko no Hakoniwa to Kankei -Mushibamareru Meimon Joshi Tachi-

Aobain Academy is a prestigious boarding school where children from many prominent families gather.
Asakura Kanato, from an ordinary family, is admitted to the academy as a special case along with his sister, Mizuki.
The special organization that Kanato and his friends join at the academy, the “Shirashio-kai,” is tasked with exploring another world and recovering “civilization-class artifacts” that could drastically change modern civilization.
The entrance to the other world was supposed to be only the “Goddess’s Crossroads” that appears in front of the academy’s goddess statue, but one day, a mysterious passage leading to the other world, the “Stagnation of Power,” is discovered in the basement of the janitor’s room.
The members of the Shirashio-kai begin exploring the other world through the “Stagnation of Power” in search of the civilization-class artifacts.
However, behind the scenes of their exploration, the machinations of those lurking within the academy are secretly beginning to unfold.
The schemes hidden behind the exploration of the other world and the machinations that are corrupting the white light’s miniature world…
Can Kanato protect those he cherishes?