This story is about Shinonome Hajime, an adventurer of Silver Range. He's dedicated to fulfilling missions from the guild. One day when completing a quest for monster meat, he finds a strange girl named Lily in a dungeon who's far more trouble than she's worth. Saving the girl from certain death, her story reminds him of his similar past and he takes her under his care...

Second installment of the movie.

At a CD store, Ichika Hoshino hears a song by Miku that she has never heard before. On the monitor, she sees a "Hatsune Miku" in a form she has never seen before, and couldn't help say it out loud, "Miku!?" Miku was surprised at the voice, her eyes meet Ichika's, but she disappears shortly after. Later, after a live performance on the street, the Miku that Ichika saw before appears on her smartphone. Miku looks sad and downcast, and when Ichika quietly asks Miku about her story, she tells Ichika that there are people to whom she wants to deliver her songs, but no matter how much she sings, her songs are not reaching them. Miku, who saw Ichika singing to the hearts of many people at her live performances, thought that if she learns more about Ichika, she can do the same, and came to Ichika. Ichika smiles at Miku and says, "If it's all right with me." And a new story of Hatsune Miku and the boys and girls begins—.

Middle school student Satomi Oka ought to be proud that his choir group placed second at a national competition. However, he views this achievement as a failure caused by his inadequacies. Furthermore, since graduation is fast approaching, his time as leader of the choir is coming to an end. While Satomi is preoccupied with his inner turmoil, a smooth-talking gangster named Kyouji Narita approaches him and requests him as a singing teacher. Every year, Kyouji and his colleagues participate in a karaoke competition, where their boss personally designs a tattoo for the loser. To avoid such cruel and unusual punishment, Kyouji asks Satomi to help him find the best song suited for his vocal range. Albeit reluctantly, Satomi sets his fears aside and agrees to join Kyouji at his karaoke practice sessions. But it remains to be seen whether the mismatched duo will overcome their respective obstacles or fail miserably.