Kiss x Sis

Keita Suminoe finds himself in a complicated situation with his two older step-sisters, who happen to be twins. Though not related by blood, they openly express their romantic and even lustful feelings for him, often turning it into a playful competition. His friends find this amusing, though Keita usually brushes it off without much fuss. One day, the sisters surprise him by showing up at his school to deliver his lunch, which embarrasses him and makes him lose his temper. Sensing his frustration, they take the opportunity to publicly declare their genuine affection for him before walking away. Overcome with guilt, Keita runs after them and promises to work hard in his studies so he can attend the same high school as they do. Their unconventional relationship continues to blur the lines between family and romance, leaving Keita torn between irritation and a growing emotional connection. The dynamic between them remains unpredictable, filled with teasing, affection, and moments of unexpected sincerity. Despite the awkwardness, Keita can’t deny the bond they share, even if it defies societal norms. The sisters’ boldness keeps him on edge, yet their unwavering devotion makes it hard for him to stay angry for long. As their interactions grow more intense, Keita must navigate his conflicting emotions while dealing with the reactions of those around him. The story explores themes of love, boundaries, and the complexities of unconventional relationships.