Shiritai Anata no Naka

Back in high school, Eiko was betrayed by her only friend, Fujino, over a romantic misunderstanding. Deeply hurt, she resolved to start fresh at the university she entered and keep a low profile. There, she reunited with Nanao, a classmate from long ago. Nanao had a crush on Kaji, a guy in the same club—even though they were both guys. Drawing on her past experience, Eiko bluntly tells him that it’s a hopeless romance. To her surprise, Nanao asks her for advice.

“I need someone to help me. For now, I want to develop my butt for Kaji’s sake.”

Eiko initially refuses, but as she comes to understand Nanao’s pure feelings, she agrees to help with the “butt development.” Gradually, feelings begin to sprout within Eiko. …Is this curiosity? Friendship? Or perhaps…

(Source: forcs, translated)