Doushin ~Sanshimai no Etude~

Meet the Suruga sisters: Ryoko, Maki, and Miho. After their parents' passing, they live together, relying on each other to stave off loneliness. But they harbor a secret no one can know: a mysterious physical bond links them, so that a sensation felt by one sister is instantly shared by the other two, no matter the distance. If one pricks her finger, the others feel the same pain—and if one becomes sexually aroused, the other two immediately experience that same excitement. As they navigate daily life, this uncontrollable connection leads to bizarre and dramatic consequences in this adult-oriented RPG, where each sister never knows when she'll be swept up by the others' emotions.