After completing the collection at the Righteous Camp, let's teleport to the Market and enter this restaurant that requires a Pipa to unlock.
This restaurant is just below the teleport point stairs; simply turn left.
Enter and defeat the enemies on the first floor, then pick up the item ahead.
There's another room behind here with items inside.
After picking up the item, take the stairs to the second floor. You can ignore the enemies on the second floor for now and head straight to the third floor. Defeat the enemies on the third floor and grab the Dust on the right (you need to break the table to interact with it; not sure if it's a bug).
There are stairs leading down in the next room. Let's not go in yet; head forward to grab the purple item first.
Talk to the woman on the left of the purple item to accept the quest "Never Forget".

