"Miharu Usa", who suits Eswan's most sister character, completely reproduces a number of naughty delusions that a man has always had! I sympathize with everyone's thoughts, such as "If you are trapped in a physical education warehouse after school", "If you come across a scene where you are masturbating in the classroom", "When you return to your parents' house after a long time, your sister's body was growing rapidly" We have prepared a situation that will not end up! Please enjoy the daily life full of romance of a man with the most naughty and cute little sister.