Theresa was assassinated and the Tower of Babel fell. After the nameless soldiers involved in the core assassination mission were eliminated, W's anger was not extinguished yet. Next on the revenge list is a team of Sarkaz mercenaries who provided assistance outside the assassination operation. They were escorting "something" and fleeing to the border...
 
This is a memory that W has never mentioned.
 
It is the epitome of the Sakazi's struggle to survive the long war - the victim will pick up the dagger of the victimizer, and the cycle of destiny will continue.
 
(Source: Bilibili, translated)

Pilot episode for the Kay's Daily Doodles series shown at the Chinese 3rd Anniversary Special Livestream.

One, two, one, two, line up! Bow! Welcome! Hello, Doctor, I'm Beanstalk, and as of today, the Metal Crab Café is officially open for business in Rhodes Island, staffed by my adorable crew, including Rock, Hercules, and... Those three? You mean little Kay, Bubble, and Popukar? No, no, they're not staff, they're... Well, you'll find out when you come and have a cup of coffee!
 
(Source: Bilibili, translated)

A banquet was planned for honored guests, everyone got an errand for this auspicious fest. Aak would cook and Waai Fu should greet, and Hung went to Jaye for some freshly caught fins. The time to feast finally arrived, yet the guests... had no place to dine.
 
(Source: Crunchyroll)

A special episode released between episodes 5 and 6 of Lee's Detective Agency. It is styled like works from the golden age of American animation and features no dialogue.

A mysterious man by the name of Lee dwells with Aak, Hung, and Waai Fu in the dark alleyways of Lungmen City. Styling themselves as Lee's Detective Agency, they strove to run errands, investigate mysteries, and mediate disputes for their neighbors. Herein lists a few of their actual yet strange cases to go with your tea.
 
(Source: Crunchyroll)

Gravity Well