Second-year student Nana is in a romantic relationship with her classmate Yuka Satsuki. One day, the two share a kiss in an empty classroom, which is accidentally witnessed by their teacher, Shoko Mikami. Overcome with jealousy, Shoko develops an intense obsession with Nana. After school, Shoko forces the couple to perform passionate acts in front of her—deep kissing, tongue penetration, saliva exchange, and intense oral stimulation. In the gym storage room, Yuka's white leotard is soaked as Shoko devours her body, using a strapon to penetrate Nana deeply, intensifying their twisted bond. A shocking tale of female jealousy and desire, woven through kisses and strapon play.