An explanation of what happened in Astel's birthday live, with some context for anons out of the loop (I am not a translator, just summarizing info from his fans).
>Astel is an alien who came to invade Earth but he crashed (supposedly in the Bermuda Triangle) and got scouted as an idol, he has some amnesia as a result
>Two weeks ago he went on a "trip" to find his friend, a vague voice message on his twitter in the middle of this trip gave coordinates to the Bermuda Triangle
>Birthday live shows us what happened on that trip, Astel swam down to the ocean and found Atlantis, searched for Polneu for 3 days until he found a machine
>It's too technologically advanced for Earth, and Astel notices it can be used remotely and Polneu ran a program on it
>Before he can check, Gura's father aka the little lion dude named Apolleon shows up, tells Astel he came to Earth to investigate "dimensional energy fluctuations" that started 3 years ago, if left alone the universe will be in danger, the machine is the source
>Notes Earth is unaffected but Astel and Polneu are, implying they're from another dimension, and the fluctuations are affecting THAT dimension's Earth
>Apolleon tells Astel he'll have to eventually choose between his old friends and Holostars, Astel is in despair, sings a song, gets some resolve and says he refuses to choose and will save ALL the Earths, he'll save everything
>Says he's an invader so he'll get what he wants
>Apolleon says to himself it's because Astel is an invader there's an issue, will have to face a big obstacle in the future
>Apolleon joins Astel's party
>You Are Here
