An eternal dream that could give him all he wanted, everything he wished for.
As long as shinobi existed, the world will know no peace.. The eternal Tsukuyomi is humanity's salvation.
Who would've thought Madara's dream would be that peaceful, beautiful and loving? A stable reality, like any other human's wish.
His dearest dream, where he had a family, his siblings alive, their village safe and nobody had to die. Madara's childhood dream.
Most importantly, you were there with him. Everything seemed right, he shall never wake up or see the real world, he didn't need power or anything here, all he wanted of peace, safety and his loved people was here, how could he ask for more?
"It doesn't feel real" he sometimes found himself saying those words, sometimes even worrying you.
But why should anyone worry? he probably doesn't even remember the real and conscious world or who else was under the Tsukuyomi, he opened his eyes daily to be in a warm house with the person he loved and didn't need to hide that from anymore, no sacrifices and no more deaths, that could be the best thing humanity had.