After her mother abandoned her and her father remarried, high schooler Mao Motomiya is left feeling like she doesn't have a place where she belongs. One night, her childhood friend Hiro Nakamura finds her in a shrine eating cheap convenience store food and offers to take her to a restaurant. Their subsequent heart to heart leads to Hiro suggesting that Mao move in with him.
To Hiro who has lived apart from his younger siblings all these years after their parents passed away, bringing his family back together in the once-lively Nakamura home begins with the first step of giving Mao a loving place to belong.
When Mao reluctantly accepts his invitation, she is surprised at how easy it is to settle in with her longtime friend. Now she must deal not only with mending her relationship with her father and helping the oldest Nakamura brother attain his goal, but also her growing feelings for Hiro.