Tate no Kuni

A world stretching down from the heavens: the Vertical World. There lives a boy named Ruska, who finds himself fascinated by the world below. One day he sees a girl falling from the sky above, straight towards the bottom... And so begins his adventure surrounding the mystery of the Fallen Maiden!

(Source: MANGA Plus)

Tate no Kuni began as a web manga submitted to the Jump Rookie site on August 13, 2018, where it won the Bronze Rookie Award for August 2018. The series was simulpub in English as The Vertical World through MANGA Plus.