"From today, I'm going to be everyone in the family's baby" -- A full simulation! A pampered regression life! Sara, the older sister, is too carefree with her attitude and body. The family, troubled by endless problems, decides on an unexpected solution: a re-parenting punishment! "Sara, you're being demoted to the second daughter today, and you'll have to start your life over as a baby!" "I'll take good care of you from now on, big sister... Sara-chan?" Being taken care of by her S younger sister Miu is a daily humiliation! Living in diapers 24/7 means she can't go to the toilet and always wets herself. She's force-fed baby food, put to sleep with picture books, and spanked on her butt for being a naughty girl who masturbates. But even when she eats or changes clothes, she's showered with affection and praise! If she's melted by Miu's overflowing maternal instincts, she might want to be a baby too...?! This is a 30-day forced baby life, a gift for those who want to experience it once.

「今日から私、家族（みんな）の赤ちゃんにされちゃいます」――完全シミュレーション！甘やかされ退行ライフ！ 態度もカラダもだらしなさすぎる姉・さら。トラブル続きに悩まされた家族が下したのは……まさかの育て直し処分！？ 「さら、お前は今日から次女に降格、赤ちゃんから人生をやり直してもらう！」 「今日から私がちゃんとお世話してあげるからね、お姉ちゃ……さらちゃん？」 ドSな妹・みうのお世話は、毎日が羞恥の連続！24時間おむつで生活！だからトイレに行けずにいっつもおもらし！離乳食を食べさせられたり、絵本で寝かしつけられたり、オナニーしちゃった悪い子にはお尻ペンペン愛のムチ！ でも、ご飯食べてもお着換えしても、ダダ甘やかされて褒められちゃう！美羽から溢れる母性に蕩けさせられるなら、赤ちゃんにもなってみたい……かも？！ 一度は体験してみたいあなたに贈る、無理やり赤ちゃん生活30日！※ 配信方法によって収録内容が異なる場合があります。