Talk:FAQ/@comment-2601:204:D000:D757:DD7F:2868:2A43:705D-20180712223613/@comment-26005122-20180713042355

Depends. If you already played Tsum Tsum using LINE at any point, and for some reason started playing a guest account, when you log in with your LINE, it'll cancel any progress you made with the guest account and you'll continue from the last time you played while logged in with LINE.

If you're transferring a guest account to a new LINE account, then it will save all your guest account progress to the new LINE account.