Protect the Melody of Love! Usagi is a Cupid
Protect the Melody of Love: Usagi Plays Cupid
Mamore koi no merodi! Usagi wa Kyupiddo
"One rainy day, Usagi bumps into Yusuke Amade, a famous musician who claims he is being chased by a monster. Realizing the man is telling the truth, Usagi and Luna decide to keep an eye on Yusuke by staking out the venue where he performs." (source)