What Is Love? x Kami Is Prostrating Himself Now lolol

Struggling to find Seiji, Akane and Yuzu are worried when Guri tells them that he is off with Shikimi searching for her crush. The concern is warranted when Seiji finds himself in the midst of a torture session! Her ultimate goal isn't just Seiji, but Akane and Yuzu. What is her link to the two sisters and what is it that she's after?