ABO modern novel with two heroines, science and technology, glandular differentiation
Concept: I often dream of a girl with a red bell and a girl with white wings. The girl with the red bell is surrounded by small bright red butterflies, giving people a sense of nobility and elegance. The girl with white wings holds her hand, and the white wings cover their bodies. I don't know what they look like and what clothes they wear. White wings and red butterflies