Books in the My Next Life as a Villainess Side Story: On the Verge of Doom! (Manga) series

COUNTDOWN TO DOWNFALL!As Katarina strives to avoid her imminent demise, she gradually begins to confide in the people around her. But with the sudden appearance of her adoptive brother, Keith—one of the possible agents of her destruction—things have taken a turn for the awkward. Katarina tries to get along with Keith, but his deep emotional scars leave her at a loss. If he abandons hope, could this spell doom for her after all?