The focuses more on the plot and light romantic comedy.
When searching for confusion often arises because the series is split into two distinct parts.
The story begins with Keita Aoi, a high school student who becomes involved with his two stepsisters, Ako and Rika Minami, after their father marries Keita's mother. Ako, the elder sister, is a kind and caring person who often finds herself taking on a maternal role, while Rika is a more energetic and flirtatious individual. Throughout the series, Keita navigates his relationships with his stepsisters, dealing with various challenges and comedic situations that arise from their interactions.