Hello, it says I own this game for 245 days. How can I get the Steam key? o:
Steam keys are available, but only to those who payed for the game. If you payed for the game directly on itch.io, just go to the download page and there should be a "claim Steam key" button. If you payed for it in the OtakuMaker bundle then there should have been an email containing the Steam key.