Aoi Shirakura

Kujo Rina is a chemistry teacher and the homeroom teacher for the 3rd grade D class at Horai High School. She doesn't have a bond with her students. On the school's graduation day, Kujo Rina is pushed from the 4th floor and falls down. She is able to glimpse a school uniform sleeve on the person that pushed her. At that time, she wonders why she was pushed and that she does not want to die.

Four high school girls in an astronomy club once dreamed of going to space together. Years later, as adults leading separate lives, they unexpectedly reconnect with their forgotten ambition. Inspired by the idea that an ultra-small satellite might finally make their dream achievable, they reignite their passion and embark on a second youth chasing space.

Kasumi, a high school student, has lived her life with curling in a scenic town near Karuizawa, home to the oldest curling field in Honshu. In her elementary school days, she won the championship with her childhood friends, on the team called Miyo Stella. However, the team later disbanded, and Kasumi was left feeling depressed. Meanwhile, the town was in the midst of an international curling tournament being held locally. Kasumi's passion is rekindled, as she thinks, "This is my chance to play in an exhibition match at an international tournament where I can compete against strong teams that will be competing in the Olympics!"