Finding your next obsession
Finding your next obsession

The story centers on a pair of stepsiblings. When Kōta's father gets remarried, Kōta's first impression of his new stepsister Aika is that she is beautiful, but that image is shattered pretty quickly. His new stepsister is a super sassy and foul-mouthed gyaru who behaves uncontrollably while their parents are away, making Kōta's life a living hell. However, their relationship begins to change when Aika gradually warms up to Kōta's caring older-brother nature.
LUXEN Decision Guide
A lighter series choice built around character chemistry, recurring situations, or an easier episode-to-episode rhythm.
Best fit
Who it is for
Best suited to viewers who want something approachable that can work as a relaxed or repeat watch.
Commitment
Compact commitment · 12 episodes
Use the season and episode count to judge how much time you want to invest.
Start here
Read the synopsis, then check the trailer.
Read the synopsis first, then check the trailer to judge whether the contained season fits what you want tonight.
The series

12 episodes
2026
Cast
Tap a cast member to discover more of their work.