High school student Tsuzuki Takumi lives under the same roof with his sister.
My sister is the responsible manager of the nearly bankrupt pastry shop "Strikez", but she is a clumsy, reckless and bad person. She has to rely on the help of her childhood sweetheart Fumino Serizawa who lives nearby to barely maintain the operation of the store.
But one day my sister picked up a mysterious beautiful girl and brought her home.
Not only that, Qiao also formed a club at school with his daughter-in-law who had a crush on him and the bad friend in the class.
In fact, all the beautiful girls have a common secret.
Around this secret, a joyful romantic comedy intertwined with a man's friendship and a domineering beautiful girl unfolds.