really good! E'sekai are a new girl band based in Osaka, they have been appearing on my timeline since earlier this year but wasn't until recent that they released their first MV which has been the perfect chance to look into them more in detail
you may have noticed some similarities with early SCANDAL which is fair since they cite them as an inspiration, just like them they formed the band while still in High school (i think neither has graduated yet but may be on their final year, according to what i gather from the updates) which is also the reason about their costumes being actual uniforms
another interesting thing about them is that they are a band, they play instruments, they sign, etc the normal but they also include elements of dance groups into their concerts so for example some of their songs are played with instruments but other of their songs or covers have a choreography
i think it's a cool idea, they are primarily a band but they also can appeal to other audiences
also obligatory "have they covered SCANDAL yet?" and the answers is YES