Workaround

Since Android can't log in due to the store review not being completed, I'm using a workaround. How to do it: Open dmmGAMES on Chrome and log in → Go to My Games → Tap the three dots (⋮) and check the PC version box → Select Touken Ranbu from there and launch it. This assumes you have linked your DMM account, but it's useful when you only have an Android device and are being kicked out solely on Android.