The second prince Surou was already together with the heroine – which apparently they made official that very morning even before the classes started and in front of a rather shocked and taken aback audience - so Zoemi wasn't worried about his route anymore.
After all – in the game an announcement like that would be made while the end credits would scroll through the screen, just before two final illustrations would show up – the first one with Miriette chained with the ancient bracelets, locked in the monastery far away and the final one with the happy Surou and the blond heroine as a happy couple.
Well – since Miriette was most certainly still fine – neither locked in a monastery nor dead as it would be in the heroine's bad end – that could only mean that the second prince's route was officially finished while the dark-haired girl prevailed unharmed!