In the wake of unknown Catastrophes in the heart of Terra, a mineral of unimaginable power has been discovered. With it, society's technology has made huge leaps and bounds, but the substance causes a deadly incurable disease, leading to a worldwide enslavement of the infected. As a rebellion is now on the rise, a pharmaceutical company races for a cure to save humanity.

[Source: Crunchyroll]

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]

Episode 1: Once Upon a Time in Lungmen

Originium slugs have ruined a good crop. The Feline and Zalak thus parted their ways.

Episode 2: A Holiday of Two Hours

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.

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.

Oripathy, an incurable disease that slowly crystallizes the bodies of those infected until their deaths.

Rhodes Island is a pharmaceutical company that endeavors to find a cure and solve the problems that follow in the disease's wake,
and in an attempt to put a stop to the revolt of the terrorist organization known as Reunion Movement whose ultimate goal is the salvation of the Infected,
Rhodes Island has formed a contract with the Yanese city of Lungmen and continues its mission there.

However, Amiya has found herself despondent since their battle against Skullshatterer, unable to accept the fact they were unable to save Misha.

In the meantime, Rhodes Island deploys a reconnaissance squad to an abandoned city discovered in the Lungmen countryside.
There, the squad notices a strange phenomenon unfolding before them…

Arknights mini-series.