28 to 29 go to the bar in the evening，29 to 30, have a conversation in her room，30 to 31 are automatic departures, in the morning Maria and Hanna will come to see you for the hospital check-up after Maria is taken away after buying the Elves, she will be released
331 days ago(+1)(-8)
30 to 31 are automatic departures, no need to buy Elves，31 to 32 is what needs to be purchased，Skip a few more days and take a look.If it is 31 to 32, it will automatically trigger after you purchase the Elves, and then release Maria
331 days ago(+1)(-7)
331 days ago(+1)(-7)
If it still doesn't work, please take a look and see if there are any saves before level 30 to try, because I unlocked all the characters before elevating her to level 30
331 days ago(+1)(-7)
When Maria was at level 29, save a file and try doing Maria's tasks. If it still doesn't work, you can try changing the language to try it out.I am using Chinese