After finishing her modeling job, Serina is kidnapped. Brought to a dimly lit room, she receives an explanation from Saginuma. Her boyfriend, Kazuki, has gone missing after borrowing 50 million yen from this organization. Kazuki forged a promissory note with Serina's signature, leaving her burdened with the debt. She is released temporarily to search for Kazuki, but he is nowhere to be found. Saginuma tells her to access a website if she can't find him, but this leads her into a bizarre world. Serina becomes a commodity in a fund run by a mysterious man. Each share of the fund costs 4 million yen. Under the watchful eye of an observer, she will be killed if she doesn't comply with the sponsor's demands. What fate awaits Serina, who has become an outlet for twisted desires...?