Talk:Tokugawa Kaiten Meikyū - Ōoku/@comment-36544918-20190319195608/@comment-37443387-20190319213016

Usually because of story development. Like how some characters/servants evolved with their storyline, or that some of the new cast gets invovled in the event. It's to prevent spoilers.

The level of difficulty as well. If you've managed to clear episodes 1.5 and 2, then that means you're ready to take on challenging tasks.