Anime Crossover: Seiichi Yukimura's Parallel World Diary

After everything he has been through, Yukimura Seiichi is reborn at a time before he has officially taken up tennis.

He resolves to change the past, but before he can do so, he realizes that this world seems different. What path should he take now?

The Time Government? Spiritual power? Tsukumogami? Honmaru? Youkai? Onmyoji? Exorcists?…