Square Enix updated Nier Replicant owners with details about their DLC pack. For the most part, it sounds the same as the content in North America right now. So, this wild scene of Nier weaving through a seas of smiley faces is probably in The World of Recycled Vessel.
One key difference is the storyline. Since Nier Replicant features a younger Nier, Square Enix tweaked the storyline a bit. The diary bishonen Nier discovers is from his mother, not his wife.