Unfortunately, HaKox hasn't opened up a new level yet. Just proceed with the scenes. There are new things at the store, but you don't need to shop any time soon. Plus, there's nobody in the party but Shion, so it's kind of awkward buying gear. You SHOULD buy tons of the SEVEN MOONS, as many as you can afford during this chapter. There's a rumor going around that they poison some people or give then diseases, but this will NEVER happen to our characters, and they're a cheap, wonderful item. When you're ready to move on, leave the cave and head up the new path that's available. You can't go anywhere from the previous chapter just yet... They clearly want us to go one direction for the moment.