Board Thread:Touken Ranbu Pocket/@comment-123.136.112.46-20170824155246/@comment-32903105-20170825063601

Don't worry its fine. It is a common thing for the screen to be black when you click the game. Trying clearing cache, restarting your phone, and if these still don't work then try again later. Give it some time. Just like @Miyorina said, those are also possibilities.