Aka Chihiro

Ryou is a third-year high school student who is enjoying his otaku life to the fullest, but one girl is giving him a headache. She's Asahi-chan, a cheeky childhood friend two years younger than him who attends the same high school! Even though Asahi-chan is his junior, she always teases and teases Ryou! And yet, when someone teases her, she is at a loss for words and makes a defeated face. She is also a cute girl who has few friends, is shy, and not very honest. Today, I have to teach this cheeky Asahi-chan a lesson!

YES Sister, NO Touch! Kouta, who is extremely siscon, decides to live alone in order to "escape from his little sister ". One day, however, he picks up a runaway girl named Ui, who is full of younger sisterly feelings. Although she looks and acts like a child, she is in fact a beautiful 19-year-old girl with big tits! Protect his sister? or Crossing the line? The days of agony begin!