All in due time | A crossover between two worlds

It's been 2 years since Reki went missing, and Langa has been depressed ever since. Joe and Cherry decided that it's about time he gets out and have fun, so they pull out Langa to a skate park, to which he gets lost in. There he meets a person that is strangely familiar, just like-

"Reki, is that you?"

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AU will be explained.