When Kamogawa Asumi was just a baby, her mother was grievously injured when a rocket crashed to the ground. Five years later, having been in a coma all the time, Asumi's mother finally dies, and the little girl struggles to come to terms with the death of a mother she barely remembers. In the midst of her turmoil, she meets "Lion-san", a strange figure wearing a lion mask and claiming to be a ghost. Lion-san helps Asumi to bury her mother's ashes, and finally, Asumi reaches her own decision: "When I grow up, I'm going to be a rocket pilot."
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(Source: Anime News Network)