Jump down from the second floor. There are tons of enemies below; defeat them all and grab the purple item on the steps ahead.
After obtaining it, head to the nearby save point and save your progress.
After saving, move forward. You can find a purple item in the house on the right.
After picking it up, exit the area. You can jump down ahead, and the path to the left is the one previously sealed by the red thread.
Enemies in the corridor will launch surprise attacks, so stay alert.
There's a material chest on the left side of the corridor that you can loot.
You'll need to use the Kusarigama to cross over to the other side.
After crossing, there's a second piece of silk ribbon on the left. Interact with it.
