●Act1 Ririka and Haruna's Diaper Sister Story Ririka and her older sister who loves to take care of her.Whether it's when she sneezes or when she's watching a movie, Ririka gets pissed off at the slightest thing.Her older sister Haruna, who is in her deepest trouble, prepares diapers for her little sister.However, it was the first time for both of us, so we didn't really know what kind of diaper would be perfect, so we struggled with cloth and paper.A drama about a funny sister. ●Act 2 Scenery with my little sister and her diaper A naughty older sister and an innocent younger sister.The unusual secret of happy sisters.Clean up your pee and change my sister's diaper.Forcibly hit by my sister who doesn't allow me to go to the bathroom.An innocent younger sister who is younger than she looks.Her older sister who has a naughty desire for her.A strange but happy life.But the relationship was a dangerous one with too many secrets. ●Act3 Her diaper sister and diaper sister are hit against each other.Everyday graffiti of diaper sisters.Daily life of a spoiled younger sister and two adult older sisters.In the morning, change diapers and play breastfeeding.The younger sister who sucked her older sister's breast felt the urge to urinate and wet her pee.My sister is also a diaper masochist who gets excited when she is forced to put on a diaper.Being hit by each other.Depicts the naughty diaper life of two people.