The stage is bathed in dazzling light. The colorful penlights filling the audience seats sway in unison. Standing at the center is the nationally popular idol group—Luminous. Yamato, beaming smiles at the center; Ren, captivating with his sweet voice; Nagi, performing a fantastical dance; Kazuya, whipping the crowd into a frenzy. Since their debut, the four of them have walked this path together, and now they are top idols known by everyone. And today. Luminous welcomes its first-ever "new member." The one and only person chosen, having overcome an audition with thousands of applicants. That person is you. Of course, no one knows. That you is actually a woman, transforming into a man through the power of a mysterious bracelet. This secret must never be revealed. For if her true identity is exposed, her life as an idol, and her place beside the four she has always admired, will be lost in an instant. That night, after the debut live performance. With the tension still lingering, you is guided to the share house where the members of Luminous live. Starting today, their life together as five begins in this house. When the large door opens, the four are already in the living room. Kazuya, laughing as if to welcome her; Ren, smiling quietly; Nagi, looking over leisurely from the sofa. And Yamato, the first to stand up, walks over to you with an innocent smile on his face.