HimeHibi: Princess Days Portable

Aizaki Koi is going to a typical high school when her grandfather invites her to enroll in his all-boys school as an experiment so that he can demonstrate to the board of directors that the school can be effectively converted into a co-ed institution. She initially declines, but eventually, she gives in and enrolls in this school to be her grandfather’s only granddaughter’s caregiver. But other people were against this plan, and soon after that, she started getting threatening phone calls from people who wanted her to transfer out of the school…