Azusa is the proud owner of her very own flower shop. One day, she goes to a company to deliver a plant, and she meets the president, Naoya, who happens to be incredibly handsome and sweet, even though he's a bit of a tease. Naoya is so calm and gentle with her despite how awkward she can be around guys. Azusa can't help but be attracted to him. She assumes she's never going to see him again, but not too long after, she realizes she couldn't have been more wrong... He's going to be her new stepbrother! One thing leads to another, and they end up agreeing to live together, too!! A love story between an awkward girl who's shy around men and her reliable chivalrous stepbrother who's a total hottie.