Nejimakiboshi to Aoi Sora  

Nejimaki Hoshi to Aoi Sora, ねじまき星とアオイソラ

The story revolves around a young boy who lost his mother six months ago due to an extraterrestrial ship crashing on their island. Despite the widespread knowledge of the incident as an alien invasion, no official confirmation has been made. On a particular day, a girl unexpectedly falls from the sky onto him. Initially, she holds him captive amidst people chasing her. However, it is later revealed that she originates from outer space. The boy's mother had imparted upon him the importance of not leaving a damsel in distress, which he applies here to help the girl escape her pursuers.