Saki looks for Zeku, the rock-singer. He is a mysterious man who appears at the live concerts suddenly, sings and goes away immediately without having anybody know where. Even so, the fans would gather to his concerts.
Saki manages to get a ticket to the concert and knows that Zaku plays the melody which Saki knows as the same melody that her music-box pendant has, which is her mother's keepsake. Zaku also turns out to be the "Kage-no-soto". Why, then, does he know the melody? Saki is so confused.
