The heroine, a young lady with a "sisterly spirit", travels through the second dimension, participates in the growth of the protagonists, and protects the younger brothers. One-sentence summary: Sister Dou S and Brother Dou M. The sister controls the younger brother and the younger brother controls the older sister. Reading instructions: PS: The so-called "sand, sugar" refers to the author feeding you a handful of sugar when he is happy, and stuffing a mouthful of glass shards into your mouth when he is unhappy. (No manuscript, just so willful) 1. It's a product of pure imagination, it's hard to say how rigorous the logic is. 2. New authors need to show their respect and care patiently ( # ▽ # ) 3. This article is a comprehensive comic, and currently only the worlds of Gintama, Black and Blue, and Net King have been conceived. 4. Without saving the manuscript, the author is running around naked. 5. The heroine is beautiful and suave, a super beautiful sister.