○Story.
- Added additional story opening/ending cutscenes
- Added new map "Pool"

○Costumes
- Added YooHee and SeYoung's school swimsuit outfits.
- Yoohee and Seyoung's school swimsuits are slightly different in design and Seyoung carries a toy hammer.
- The school swimsuit costume has 3 levels of damaged like the previous costumes.
Seyoung is added to the costume menu, allowing you to change her outfit.

○Other.
- Changed the puzzle in the 2nd room on the 5th floor in a new way
(Fixed the hint notes in the 2nd room on the 5th floor)
- Added "Side Story" menu to the Extra menu
(Added 2 more stories to the Side Stories menu)
-Added [3] title screen
-Added achievement "Bongbong in the pool"
- Fixed crank motion (fixed with rigged animation)

○Bug fixes
- Fixed SeYoung disappearing after 6 hits from Abyss Zombie
- Fixed an issue where interacting with the Elite Zombies on the third floor would not end the cutscene.
- Fixed a bug where the placement UI would not disappear after completing the display of an item on a shelf
- Fixed an error displaying the 2nd floor shadow puzzle