Munakata Mira is the son of Hollywood actor Munakata Kyousuke, who he also happens to be in a romantic relationship with, keeping their family bond private from the public eye. As Mira enters high school at 15, he navigates complications with his childhood friend, who develops romantic feelings for him. Mira's life becomes even more complicated when he discovers he's adopted and Kyousuke is considering marrying a famous actress, whose son has taken an interest in him.