Reborn in the Prince of Tennis world, you begin with the Three-Tama Sharingan. Three-Tama → Mangekyō Sharingan → Eternal Mangekyō Sharingan. On your first day at school, you challenge the Seigaku prodigy, "Your tennis balls are no match for these eyes!" Three-Tama is just the starting point; the path to the Mangekyō, and ultimately the Eternal Mangekyō, has begun! The title of tennis's strongest will be born from these all-seeing Sharingans...

"I'm already a celestial being, and you tell me this is a planetary-level Devouring Star?" Yu Duan, a newly promoted celestial being from Light Source Star, the fourth transcendent saint. Looking at the three solemn-faced seniors before him, Yu Duan finally had to accept the fact that the fairy tale world had turned into science fiction, and there was also another piece of bad news. "According to information from the outer space ruins, we face a threat called a nova explosion. This explosion occurs every 60 million years, and each time it wipes out our planet's civilization. The next one is less than 10 years away." Yu Duan fell silent. It was enough to start with Devouring Star, but it was also on the eve of destruction. "Fortunately, I gained an additional cheat after breaking through to the planetary level..." Yu Duan looked at his extra life core and the world within his body. Inside, a scroll of the Heavenly Book hovered in mid-air. The Book of Cause and Effect, reversing the cause and effect, can predict...