Tokyo 24-Ku first launched for PC in May 2020 in Japan.
Here is an overview of the game’s story, via VNDB:
Our protagonist, Akihiro Sonogi, is a promising young member of the House of Representatives aiming to be top of the faction. After a suspected terrorist bombing in Tokyo’s Shibuya district, he was elected to tackle the case. An intricate drama depicting the love and hate relationships of Japan’s greatly ambitious upper class thus begins!
Visit the teaser website here.