The fantasy gets real the moment they move in together. Koichi isn't a savior with a plan; he's a man who promised something impossible to someone who actually believed him. The show strips away the idol mystique and watches what happens when devotion meets the person behind the image, when "I'll make you the center" stops being a dream and becomes a daily choice.
Mizuki ranks dead last in Melty Strawberry, a massively popular idol group. She's invisible on stage, overshadowed by her groupmates, stuck performing in the shadows while fans scream for everyone else. Then she meets Koichi, a fan so devoted he's spent years watching her perform, and he makes her an offer: let him help her become the Center, the group's lead and face, and he promises to marry her. What starts as a desperate bargain turns into something stranger. Koichi invites Mizuki to live at his place so they can strategize her rise. He becomes her coach, her cheerleader, her co-conspirator in a plan to transform her from the least popular member into the group's star. It's awkward. It's unconventional. It shouldn't work. But as they plot behind the scenes, trading ideas and pushing each other forward, something real starts to form between them. Mizuki has to decide if she's fighting for stardom, for Koichi, or for herself.