Six Gravity (AKA Gravi) and Procellarum (AKA Procella) both belong to Tsukino Talent Production (AKA Tsukipro).

Gravi continues to expand their range of activity as Tsukipro's top group and sets their sights on the joint concert Full Moon Festival 2020 as their next goal. Kakeru Shiwasu and Kisaragi Koi are tasked with recording comments from the group's members hyping up the event.

Choosing "a new me" as their theme, the two boys enthusiastically search for filming locations and set up a schedule for their comment video recording tour, but will it end without incident...?!
They do look super cool, 
but something's missing.
يبدوان رائعين، لكن ثمّة شيء ناقص
Die sehen zwar richtig cool aus,
aber es fehlt noch irgendwas …
Lucen bien, pero algo falla.
Están geniales, pero falla algo.
C’est très classe,
mais il manque quelque chose.
Sono fighissimi, ma manca qualcosa.
Eles estão tão bacanas, mas falta algo.
Выглядят хорошо,
но чего-то не хватает.