JUR-549 | In a dark gym, she is drugged with drugs that make her 100 times more sensitive, making her sweat and her hips tremble as she experiences a demonic orgasm during an adulterous affair with Maki Hojo.

Recently, a trendy dark gym opened in the town where the Hojo couple live. Maki immediately decided to go to the gym to relieve stress, but in reality, the dark gym was a corrupt gym where the wives were given drugs that increased their sensitivity by 100 times in their drinks and took advantage of them. On the first day, Maki was drugged and it worked wonders. Maki mistakenly thought that her libido had increased after exercising, so she went home and tried to seduce her husband, but he was tired from work and didn't even look at her. Then, when Maki, unaware of what was going on, visited the dark gym again, she was attacked by the evil hand...