Rio is about to debut as an Idol by her father’s arrangement, unknowingly to her she is also appointed as the target and prize for a sinister secret game where powerful and influential people will compete to win her over. Mamoru, Rio’s childhood friend, is dragged into this mysterious competition where he is appointed as one of these players; with little to no knowledge of who runs this game and who are these players, Mamoru vows to protect Rio and uncover the dark truths behind all of this. Will Mamoru succeed in keeping others away from Rio and take her for himself, or will he lose the game and let Rio fall prey to the unknown?