Yōji Katō is a blond actor from the adult film industry aspiring to mainstream acting success. His bold, outgoing nature starkly contrasts with fellow actor Kyousuke Iwaki's reserve. After an audition for a mainstream erotic film directs them to engage sexually, Katō initiates a romantic pursuit of Iwaki, seeing the encounter as the spark for genuine emotional attachment. His persistence gradually breaks down Iwaki's resistance to their mutual feelings.

Katō hails from an accepting family environment that supports his career and later embraces his homosexual relationship with Iwaki, displaying an openness uncommon among other characters' families. Professionally, he transitions from adult films to mainstream acting projects, while his relationship with Iwaki evolves from rivalry to partnership. Challenges arise when rival actor Katsuya Kikuchi returns to Japan and co-stars with Katō, creating tensions that test yet ultimately strengthen Katō and Iwaki's commitment.

Throughout their relationship, Katō actively addresses Iwaki's internal conflicts about his sexuality and career. External pressures include intense media scrutiny, particularly from Kazunari Urushizaki, a stalker resembling a younger Iwaki who becomes a reporter to infiltrate Katō's life. These encounters further highlight Katō's protective instincts towards his relationship. His character arc concludes with a sustained personal and professional partnership with Iwaki as they navigate the public exposure of their relationship and continue their collaborative acting work.