[Sister controls wasteland smuggler brother x genetically defective little sister]
A strange man appears in the life of high school student Hibari.
His origins are a mystery, he acts ruthlessly, lives alone next door to Yunque's house, and is cold and indifferent to everyone.
However, he was very doting on Yunque, and he kept teasing her by calling her brother all day long.
Yunque suspected that his purpose was impure, so he was on guard against him and treated him coldly.
But... I always dream about him at night.
She dreamed of him running in the rain from a strange, dilapidated and dangerous city to feed her a sweet nutritional supplement.
"Brother's little bird, all diseases are gone, and it can fly high quickly."
*
Survival in the wasteland / cultivation system / amnesia story / mutual redemption and each other's only
Intention: Love is companionship that overcomes all difficulties.