"Ayane-chan, will you marry me?" A sudden proposal from a childhood friend who is 10 years younger than her? --- Ayane Kakihara, 34 years old, is actively looking for a marriage. She just got dumped on a date today, saying, ``You don't need a man for the rest of your life, do you?'' Her mother called and said, ``I've sent you a good person,'' and the person waiting in front of her house was her childhood friend Itsuki. Ayane is confused by the sudden proposal from a man who has even changed her diaper. Although she refuses because he sees her only as her younger brother, she has a soft spot for Itsuki, whom she has always loved. She allows him to live with her for a week and approach her every day. A week has begun where you will be at the mercy of the trees that will approach you if you give them a chance!

"Do you want to try a pseudo-love affair with me?" His invitation was sweet and charming, and it was a chance to change herself. She hears her co-workers making fun of her for never having a boyfriend and her boss, whom she admires, saying behind her back that she's not interested in him. As she tries to contain her frustration, she is rescued by a handsome stranger. He calls himself Kanata and advises her to find love and improve herself if she wants to impress her co-workers and boss...