Before entering the school, Duanmu Ai had already identified Takemaki Ann as the target of the investigation for a simple reason—Shiho Suzui, who had previously been rumored to have committed suicide by jumping off a building due to teacher bullying, was Takemaki Ann's close friend, making her motives sufficient.
Moreover, according to the rumors in the school, Takemaki Ann had always been rumored to be romantically involved with that teacher before Shiho Suzui's suicide. However, according to the intelligence circulated among the students, Takemaki Ann always maintained a chilly distance during her encounters with that teacher at school, leading many to believe they didn't want to expose their relationship on campus.
But considering Shiho Suzui's situation, it was very likely that the teacher was using Shiho Suzui as a hostage to force Takemaki Ann into a relationship. Although unwilling, the latter had to comply due to her close friend being in the teacher's clutches.
