Eichi completes the mural on the dam's wall, he tells Tone that the rest will be left to them before he leaves. Miri under the orders of the Monster, rides her 'Rat Monster' for a final battle with Bocca. Bocca uses the "Crying Bow String" technique to defeat Miri. The Dam is destroyed to reveal Eichi's final work. When Tone and Bocca part their ways, it is revealed that the blue eyed boy is Tone's Aibar machine. Bocca also spots Tone's stigmatic mark on her thigh.
モンスターユニオンとの戦いの傍らで語られる遠音と絵市の想い、そして”謎の少年”との出会い。
すれ違う人々の想いに隠された過去の因果を断ち切る為、今、遠音のメロスが鳴り響く!