Kiss x Sis: Ako Suminoe

Ako is the oldest of the twins. She is also the smartest of the two as she good grades in her studies. While it is shown that both she and Riko has a lust feeling her Keita, Ako's is shown to be least as she is shy. a known characteristics about Ako is that she has the habit of kissing Keita and making excuess by telling him those are either "welcome home kiss,” the “make-up kiss,” the “study well kiss” and so on.