Ran->Sem: Hakudaku Delmo Tsuma no Miira Tori

Riko's life is thrown into turmoil when her sister disappears after joining a mysterious enlightenment group seminar. Suspecting foul play, Riko decides to infiltrate the seminar herself, hoping to uncover the truth behind her sister's disappearance. However, gaining access to the same course as her sister proves challenging. The seminar's ranking system is based on helping others achieve sexual release. To advance and get closer to her sister, Riko must participate in these activities. The anime explores the lengths Riko will go to in order to find her sister, highlighting themes of desperation, manipulation, and the bonds of family within the unsettling environment of the seminar.