It's strange, the basic premise is neat but how the story handles it is weird, especially Sora/Pandora since she's ridiculously stupid, further even in the past life she just seems unable to grasp motivations so when people say or do things she takes it as literally as possible... Also the naming is stupid, I know it's a boy band and they use the mythological naming as stage names but Prome? Epi-Oppa??? And then the one dude that's just Scylla? Also Scylla is a female monster and it's a traditionally female name, there's 0 reason that he'd use Scylla as a stage-name or be reincarnated from Scylla...
Maybe it gets a lot better in later chapters but up to chapter 31 it's pretty boring.