Fatal flaw(English) 
* Please note that Japanese is translated by Google Translate, so there may be strange phrases.
This is ししじょーぐー[ro97hanc].
Currently it is Route 58 [fs2ehmgl].
This game seems to be able to start the game without linking it to a Google account or STOVE account.
I started the game almost two years ago, so I completely forgot about it, but it seems that I started the game without linking it.
In this case, there seems to be no way to link to either account after the game starts.
Nor can you recognize that you are in such a state.
This is a fatal flaw when changing smartphone models.
There is no choice but to abandon the environment in which you grew up.
I also had to abandon the environment just before Lv30.
I strongly feel that we should implement measures to avoid this situation.
You should be able to link to your account even after you start playing, or add a function to issue a password to take over for players who are not linked to your account. You should also let each player know about it.
Unfortunately, I can't go back to the original playing environment.
Please implement a relief function for players who have not linked their accounts so that you will not create any more players like me.
Thank you for your cooperation.
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I sure feel you, bro.
I also lost my previous main account (dummyboy - 1f3spxia) when I changed phone a while ago, though my case was not as bad as yours, since it was only lvl 24.
Still, something to improve, for sure.