In order to invite Shun Raimon, an excellent mechanic who is not in school, to join his partners, Ono Hoshikaigo challenges a duel with plastic bottle rockets.With the support of his classmate Akenai Yuhogi Haruno, who was aiming for the universe, he set the highest record, but it was still one step behind Shun.The three of them were frustrated, but Shun, who was moved by Haiguo's focused posture and frank words, appeared in class for the first time the next day.The four people said that in order to gain attendance days, they helped make rockets and finally officially started their journey into the universe.However, huge difficulties have come...