Shoujo Sect EP1 - First Period

Sixteen-year-old Shinobu Honda is known as the "player" in her school because of her sexual charisma with other female students. Sixteen-year-old Momoko Naitou is the one who tries to keep her so-called friend in line. Meanwhile there are strange stories about the "Phantom Doll" spreading across the halls. The Komai sisters seek advice from both Shinobu and Naitou about what to do to about dealing with their growing relationship and end having sex after Chizuru confesses her love to Shigure one night, half naked. After Maya, one of Shinobu's admirers, steals a kiss from her while she is sleeping, Shinobu punishes the girl by lustful teasing and submitting her with her seductive talents and the help of her best friend and lover Kirin. After that, Naitou realizes that both of the Komai sisters didn't arrive at class today. The next day, during swimming class, Chizuru shows her lover to Naitou on her cell phone, it was her own older sister, Shigure, who Chizuru was in love with! Later, Naitou is on closing duty.

She sees Shinobu and accuses her of giving Shigure inappropriate advice up on the roof that morning which starts up an argument and an awkward moment between the two girls.