I Came from Twenty Years in the Future [Anime Crossover]

Twenty years ago, tennis star Kunimitsu Tezuka was still a stone-faced captain, vexed by troublesome club members; Twenty years ago, the man who would rule the Atobe business empire was still a brash peacock, hopelessly addicted to his own glamorous persona; Twenty years ago, the legendary actor Ren Tsuruga was still a faux-perfect man who spent every day hiding behind a mask; Twenty years ago, Hikaru Shindo, the youngest player ever to earn the Honinbo title, was still a noisy boy who never stopped chattering; Twenty years ago, Akira Toya, the Meijin renowned alongside Honinbo Shindo, was still a young aristocrat of the Go world who knew nothing about dealing with people; Twenty years ago, the music world's superstar Shoutarou Fuwa was still an obnoxious, arrogant, self-absorbed, clueless, woman-bullying adolescent; Twenty years ago, the kirin who would choose the peerless wise ruler destined to bring prosperity to the Kingdom of Ko was still an insolent brat who thought he was the only one of his kind in all of heaven and earth; Twenty years ago... This is really the story of a seemingly stone-faced, naturally devious boy who travels back twenty years and turns the lives of the younger versions of his uncles into complete chaos! [P.S. This is a crossover. Besides Prince of Tennis, it will also feature popular anime such as Hikaru no Go, Skip Beat!, and Bleach.] [Another P.S. This is danmei, and all the pairings will be danmei too. If they aren't, then you've misunderstood!] [One more P.S. This is not a father-son story. Xiaoxia's two fathers are an official couple and will not be split up, so if you want to see Kunimitsu with the male lead, please turn left and leave.] [Last P.S. There are lots of handsome men in this story. I'll try to keep them in character. The male lead is not irresistible to everyone, though plenty of people will have ambiguous relationships with him. I'll do my best to make them all feel natural.] [I deeply hate Mary Sues. High five!] By the way, I have a very important date tonight, so I might not be able to update. Please forgive me, everyone~!