Cock Robin wo Korosu no wa

In a seemingly ordinary day, Hidaka Kishi embarks on his daily commute to school with his close friend Kimiko, only to discover a peculiar new song on his music player: "Who Killed Cock Robin?" Unbeknownst to him, a deadly game is unfolding, with him as the prime target - the Cock Robin. Fourteen other players, d믭 "birds," are competing to eliminate him, each with the promise of having their deepest desires fulfilled. However, one of these birds, Saedano Minami, appears to have a different objective in mind. As Hidaka becomes increasingly perplexed, he finds himself at the mercy of Saedano's protection, but what are her true intentions? Can Hidaka survive this treacherous game and uncover the truth behind Saedano's motives?