胸が鳴るのは君のせい

Shinohara Tsukasa, a determined high school girl, has loved her classmate Arima Hayato since middle school, confessing to him only to be gently rejected. Undeterred, she vows to keep pursuing him as they enter the same high school, where their friendship deepens despite his initial distance. As Tsukasa navigates her unrequited feelings and Arima’s complex past with his ex-girlfriend Mayu, this tender tale blends romance, perseverance, and the bittersweet journey of youth, following a girl’s unwavering heart and the slow shift of emotions in a story of love and growth. (Unreviewed summary by Grok 2)