ハートの主張 (Heart no Shuuchou)

Background
A song from the Confession Executive Committee Love Series focusing on Arisa Takamizawa, the love interest from イジワルな出会い (Ijiwaru na Deai) in middle school. This story details how Takamizawa came to help a bullied girl in her class before getting bullied herself, as a consequence of sticking up for her. She also comes to befriend Kotaro for helping her deal with the bullying, and piques Ken's interest in her with the events of this song.