Chisato Takatsukasa, a thirty‑five‑year‑old writer, looks so young that anyone might mistake him for someone in his early twenties. His stories are shaped by the influence of his idol, bestselling mystery novelist Saki Shunka, a figure as mysterious as the twists in her own books.
Chisato also acts as an intensely protective father to his fifteen‑year‑old son Riju, convinced that the "friends" his boy brings home are merely predators ready to exploit a chance. Consequently, he will go to any lengths—no matter how extreme—to keep those visitors away.
No one provokes his ire more than Riju"s tenacious best friend Shunsuke Sakaki, who refuses to leave despite Chisato"s efforts. Yet beneath their surface actions lie hidden motives. Why does Chisato distrust Riju"s companions, and what does Shunsuke secretly know about the enigmatic author his friend"s father admires? These hidden tensions create a tense atmosphere in their household, as Chisato's protective instincts clash with Riju's desire for freedom and Shunsuke's quiet curiosity about the mysteries that bind them all today.