On Tuesday, the official Twitter account for Gundam: The Witch From Mercury Anime posted a promotional video for the climax of the second season of the anime.
— 機動戦士ガンダム 水星の魔女 (@G_Witch_M) June 20, 2023
The 23rd episode of the anime will be broadcasted on June 25th, while the 24th and last episode will be aired on July 2nd.
The first cour of Mobile Suit Gundam: The Witch From The Mercury anime started airing on Oct 2, 2022. It aired until December 2022, while the second cour will air in April 2023.
The official website describes the premise of Mobile Suit Gundam: The Witch From Mercury as follows:
A.S. (Ad Stella) 122―
An era when a multitude of corporations have entered space and built a huge economic system.
A lone girl from the remote planet Mercury transfers to the Asticassia School of Technology,
run by the Beneritt Group which dominates the mobile suit industry.
Her name is Suletta Mercury.
With a scarlet light burning in her pure heart,
this girl walks step by step through a new world.
Source: Mobile Suit Gundam: The Witch from Mercury anime’s Twitter account