Ouji-sama ni wa Doku ga Aru.王子大人有毒 ; 王子様には毒がある。 ; Ouji-sama ni wa Doku ga Aru

Rizu has been taking care of Souta since they were young believing he is "cute Souta, who can't do anything by himself". But what happens when Rizu lessens her Motherly-like duties to pursue other activities? Cute Souta might do something about that.