Monster Sonic!: Senritsu no Lucifer, Tada Hitotsu no Hajimari no Uta

Lucifer has lost all interest in music after the breakup of her band, letting one empty day drift into the next. Her cousin Satan and his bandmate Ibaraki Douji refuse to leave her alone, inviting her to join their struggling indie group, Wicked Pistols, and chase a place at the MONSTERS ROCK competition.

Lucifer mocks Satan's dream of reaching a major stage and turns him down. Yet an unexpected incident forces her to listen again, not only to the music around her but also to the feeling she thought had disappeared. The first note of a new beginning may be closer than she wants to admit.