The story of Ran, the older sister of the Shiraishi family's twin sisters! - Ran's personality is proactive and proactive. - I ask him to teach me how to study so that I can do something naughty with my beloved brother. - Even though the older brother falls into the trap, he falls for Ran even though he knows that he shouldn't... Then his younger sister Non finds out about it, and the story continues in the sequel ``The Shiraishi Family's Twin Sisters: Younger Sister Non-chan.''