これは愛で、恋じゃない

In a classic tale of mistaken identities and swapped lives, high school girl Ren Hachimitsu dreams of finding true love but despises her classmate, Yuusei Hikawa, for his sharp tongue and cold demeanor. However, fate plays a cruel twist when Ren accidentally switches bodies with Yuusei's sickly younger sister, Ai, thanks to a mysterious bracelet. Living as Ai, Ren must navigate life in Yuusei's home, experiencing his softer side while trying to find a way to reverse the switch. Meanwhile, Ai, now in Ren's body, seeks to win her brother's affection, complicating matters further. (Unreviewed summary by Grok 2)