What if the black haired guy (the 1st one) went to the purple hair's timeline and they wil...

What if the black haired guy (the 1st one) went to the purple hair's timeline and they will meet when the purple haired guy will go back home..? But I still feel bad for the 2nd black haired guy tho..
Please I need at least a little happy ending.. ╥﹏╥