The girl from the Scarlet Devil Mansion meets a soul from another world, and the two souls merge into one, creating a new Flandre with a brain and reason.

After stepping onto another world called Terra, she looked up at the twin moons in the sky.

"Ugh, I want to go home so badly, I miss the desserts my sister makes for me..."

And so the girl embarked on her journey to find her way home.

"Lord of Darkness," "The Star Shining in the Night," "The God Who Emits Black Light," "The Black Sun"—Elba transmigrates into the forbidden monster Alatreon of the Monster Hunter universe. After devouring the Crimson Dragon and battling the Black Dragon to a standstill, Elba inexplicably transmigrates again. This time, he arrives on the continent of Terra, a land teeming with kemonomimi (animal-eared girls). What does that pair of red eyes, which even gods fear, see now?

The arrival of a mysterious livestream disrupts the previously peaceful lives of all parties involved. Initially, they thought the market was merely a routine stocktaking, but as the video unfolds, the truth of the world becomes more apparent to those in other worlds. Why are people who shouldn't be in this world now appearing in the world of the sea of trees?