Succubus-chan ga Yattekita!!

Ruu, a succubus who descends into the human world, tries to extract vitality from a human "brother," but ends up being completely won over instead... The story follows Ruu's daily struggles to seduce him.

(Source: Natalie, translated)

Note: Originally published on the author's Twitter on June 14, 2022, it was later acquired by Kadokawa who published the first volume on April 23, 2025.