what you talking about? once in a lifetime is a complete story with an ending, it is not abandoned or anything.
Not sure which game you played, but Once in a Lifetime not only tied up the main plotline with a pretty bow, it also gave the MC and all his lovely ladies a wonderful happy ending. (If you're not seeing it, though - check their stats regularly to make sure you haven't locked one of them out. The harem ending is the "good ending.")