Part One: The Beginning

"Why did you ruin the opportunity for Osana to be with Taro? You wanted your Senapi. That's why I killed him. I want my Senpai."

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Ayano Aishi has always depended on her best friend, Oka Ruto, for everything. They were always the closest, until Ayano falls in love with an upperclassmen. Oka fills with rage and jealousy, wanting Ayano all to herself. She'll go to any length to have her Senpai to herself.