ペチモルフォーゼ

Petimorphosis

Azusa, a new idol, is worried that when she gets on stage, she turns into a cold-hearted idol due to extreme nervousness. One day, she picks up a one-horned demon beast called Pechimo... Will Azusa be able to become a full-fledged idol with Pechimo's help? (Source: Hakusensha, translated)