>>86600463Well it's simple, you have to get IRyS, Mumei and Nerissa across a ferry, but you can only fit two of them on the ferry at the same time.
If you leave Mumei alone with Nerissa, Mumei will molest her beyond repair. And if you leave IRyS alone with Mumei, IRyS will have her way with Mumei. Mori couldn't solve the puzzle, but can (you) get them all to the other shore unmolested?