Kiss x sis is a Japanese manga series written and illustrated by Bow Ditama. The story follows the daily life of Keita Suminoe, a high school student living with his two stepsisters, Ako and Riko. The two sisters have strong romantic feelings for Keita and constantly compete for his attention.
As the series progresses, Ako and Riko become more bold in their advances towards Keita, often leading to awkward and comedic situations. Despite their taboo relationship, the siblings navigate their feelings for each other while dealing with the challenges of adolescence and high school life.
Kiss x sis explores themes of love, jealousy, and family dynamics in a lighthearted and humorous way. The manga has gained a dedicated fanbase for its unique premise and engaging characters.