Spring. As Kinohata Mira enters high school she suffers a huge shock when she finds that the astronomy club she swore to join was gone. When Mira was a young girl she promised a certain person that they'd discover an asteroid, and that became her dream. Yet starting this year the school's astronomy club and geology club have been merged into the earth sciences club. She quickly joins and in the club room she finds three unique older students as well as...
It's a star in the Cetus constellation that's 
unusual because its brightness varies.
.إنه نجم في نظام قيطس يملك لمعانًا غير ثابت
Ein rätselhafter Stern im Sternbild
des Walfischs, dessen Helligkeit variiert.
Es una estrella de la constelación
de la Ballena cuyo brillo cambia.
Es una estrella de la constelación
de la Ballena cuyo brillo cambia.
Étoile à la luminosité changeante
de la constellation de la Baleine.
Fa parte della costellazione della Balena
É uma estrela misteriosa que fica na
constelação de Baleia e que muda o seu brilho.
Таинственная звезда из созвездия Кита,
которая меняет яркость.