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Ye Cheng traveled to a world with magical girls for decades, leaving deep traces here. As time goes by, he becomes the admiration of all magical girls and is known as "the man behind magical girls." However, during an ordinary sleep, when he opened his eyes, he returned to Blue Star. Decades of experience in fighting against disasters made Ye Cheng tired. When he came back, he just wanted to live an ordinary and peaceful life, enjoy daily life, and do some research. But even if he lay down and did nothing, the place where he was gradually became the center of the world. Because the familiar magical girls from Earth Star also came to Blue Star one after another, and some even came earlier than him. In their mouths, he is the savior of magical girls, the smartest professor, the hope of mankind, the savior of the world, and the great leader... No matter how unsolvable the problem is, it can be easily solved in his hands. "The magical girl in the groove is still chasing me!" [Magical Girl, Shura Field, Pure Love, Harem, Invincible, No Green, Behind the Scenes]