This is a shopping mall. In order to collect energy and go home, the brother and sister wandered around in various places, Qing Sili; "Brother, we have lived here for a hundred years, let's move." Qing Siyi looked at Qing Sili dotingly: "Yeah."
Qing Si also looked at Qing Si Li: "Don't you like me?" Qing Si Li whispered: "Aren't you my brother?" "I have lived here for thousands of years, and you have forgotten whether I am your brother." Qing Si Li was heartbroken in the face of her brother and turned into a lover.
This is a story about two people who really just regarded each other as brother and sister at first, and finally became lovers.
Concept: Aliens on Earth