Tranquil Bathhouse is an area accessed from the blue woman in Tanunjon.
Features
This area is comprised of several rounded rooms, lit by sunlight peering through the windows. There is also a mist covering the entire place. The first room has two women wrapped in towels by a pool. Interacting with the standing one will teleport you to Tanunjon. The next room over has a huge window and two structures, one of which is shaped like a crescent moon. There is also a Squiggle bathing here. Continuing forward to the right brings you to a hall with a green seat and two blue tables, as well as another large pool. There is a small chance there will be another Totsutsuki floating in this pool. Heading downwards from that reveals many construction signs, implying the area will be expanded upon in the future. To the right of this is a dropoff, with a girl wearing a hat sitting by a small garden. There is also a doorway here which takes you to a room with a rabbit at a desk, some defunct arcade machines, and the Pinball Machine. Interacting with it will suck Totsutsuki inside.
Directions
Totsutsuki's Nexus → Tanunjon → Tranquil Bathhouse
Gallery
The Pinball Machine.