Space patrol trainees Mel and Elna. They mistakenly intended to repair the spaceship while it was sailing, but accidentally broke the machine. The two who fell to the earth met Noruma Hibino, a soft-spoken high school student who would seduce girls indiscriminately when he saw them. Naturally, the two of them are persuaded and teased, but despite their misunderstanding, they like Noruma, and since the spaceship is broken, they end up staying at Noruma's house, and the strange lives of the three begin. Began! Will they be able to return to space again!?