Pleasure biological experiment

Everything started after receiving a package in a room in a certain apartment. In the room, female college student Rie Murakami (played by Saeko Kizuki) and her lover Hirokawa are in love. The TV behind the two played the video in the package. The package was sent by Rie's friend Motoko (Hashimoto Kyoko). She sent this video to Rie from the beach resort hotel. In the winter, there were few customers at the seaside hotel, so as a promotional tool, the hotel provided free hospitality services to young people. In the video, an innocent-looking Motoko invites Rie to the hotel. So Lihui came to this hotel called "Ting" alone. There is only one receptionist named Tiantian at the front desk of the deserted hotel. Soeda asked Rie to draw a card from the playing cards. Soeda looked at the spade card that Rie had drawn with a strange look on his face, and where would this spade card lead Rie's fate...