Ran→Sem ~A Captura da Múmia da Esposa Delmo de Fluido Branco~

"Sis, have you ever heard of the Self-Liberation Movement?"
"Anna, are you going to attend the seminar?"
"... Yes, is that not okay?"
"Right. I'm against you going to a place like that."
A few days after such a conversation, Anna disappeared.
Riko consulted the police, but they brushed her off, saying there was no case.
Riko decided to find her precious blood-related little sister with her own hands and visited the seminar's branch office multiple times, but she was turned away at the intercom and still had no idea where her sister was.
One day, when Riko was at a loss in front of the building where the branch office was located, a stranger named Naomi approached her.
Naomi told Riko that her fiancé, whom she had agreed to marry, had also attended the seminar and had not returned.
Riko accepted Naomi's invitation and decided to find her sister by infiltrating the seminar.
Later, Naomi told her about her own investigation results.
Naomi discovered that Riko's sister Anna was taking a course called the "Desire Suppression Class." She also found that each member had a rank, and low-ranking members could not meet with high-ranking members.
Using the excuse of "curing excessive lust," Riko and Naomi attended the seminar.
At the seminar, they were required to sniff aromatic oils before taking the course, and these oils had aphrodisiac effects.
Riko was insensitive to the aphrodisiac, so she pretended to be affected by it and attended the seminar.
The course was full of humiliation, but Riko persevered and continued attending the seminar in order to see her sister.
As she repeated these days, Riko was struggling with her inner self.
(Could it be... that this is the real me? Me, a former top model? No, no! I'm not such a lewd woman. It must be the fault of the aphrodisiac.)
Will Riko safely reach her beloved little sister? Or will she lose her true self?