Sekirara Hime To Minus Ouji

A short spin-off that center around Momoki Riri's daily life as the "Boner Princess" at her school while the transfer student Onodera Shouta who, thanks to Momoki, gained the title "Impotent Prince", does his best to ensure no harms come to her due to her blunt, reckless words. This manga takes place after Chapter 47 in Henjo - Hen na Jyoshi Kousei Amaguri Senko