Asuta Soro is Hazumu Osaragi's best male friend and classmate at Kashima High School. Their longstanding friendship involved mutual support, with Asuta pressuring Hazumu to confess romantic feelings to Yasuna Kamiizumi before Hazumu's transformation. Asuta embodies conventionally masculine traits and initially hoped to preserve their close male-bonding dynamic despite Hazumu's effeminate pre-transformation demeanor. He envisioned continuing typical male friendship activities even after Hazumu's confession to Yasuna.

Hazumu's accidental physical transformation into a female disrupts this dynamic. Asuta experiences conflicting emotions, finding the now-female Hazumu sexually attractive while struggling to reconcile this with their prior platonic bond. He attempts to suppress these new feelings by reminding himself Hazumu's core personality remains unchanged. However, he frequently stares at Hazumu's body, particularly during a beach trip where her bikini fuels his obvious attraction, leading to physical interruptions from Tomari Kurusu.

Asuta persists in using male pronouns for Hazumu both privately and publicly, reflecting his difficulty accepting her new identity. He harbors lingering hope that aspects of Hazumu's former male self might resurface. This creates internal conflict as he simultaneously desires to preserve their original friendship while entertaining romantic fantasies about female Hazumu. Over time, he acknowledges growing emotional distance compared to their pre-transformation closeness.

His character development resolves when he consciously chooses platonic friendship over romantic pursuit. He announces having found a girlfriend, noted as bearing a resemblance to Hazumu in appearance, symbolizing his acceptance of their changed relationship while subtly indicating unresolved attachments. Throughout, Asuta remains the primary male figure within Hazumu's social circle, maintaining friendships with the female main cast despite his romantic frustrations and occasional comedic scoldings.