Obsession can manifest within the confines of love, leading to a desire to harm, just like the urge to pluck off the wings of a butterfly. Chouko harbored deep feelings for Taichiro for an extended period, having known him since they were kids. Despite Taichiro's shocking admission of hating her and wanting to end her life, Chouko's passion towards him remained unchanged. When an upperclassman from her sports team revealed his feelings for her, Taichiro's jealousy ignited, causing him to also profess his love for Chouko. Thus commences their tumultuous and all-consuming romance, fraught with insecurities and unhealthy degrees of fixation. Additionally, there is an extra included in Yoru Koi.
