"DAKAICHI -I'm being harassed by the sexiest man of the year-" is a romantic drama anime centered around the entertainment industry, specifically focusing on the world of actors and celebrity culture. The story revolves around Takato Saijou, a 28-year-old actor who has consistently won the title of "Sexiest Man of the Year" for five consecutive years. His reign is challenged when Junta Azumaya, a 20-year-old rising star, dethrones him and claims the title for himself. This shift sparks a rivalry between the two, fueled by their contrasting personalities and professional ambitions.

Takato is portrayed as a serious and disciplined actor, dedicated to his craft and wary of Junta's carefree and flirtatious demeanor. Junta, on the other hand, is confident, playful, and unapologetically forward, often teasing Takato to provoke a reaction. Their dynamic becomes increasingly complicated when Junta reveals a deeper interest in Takato, blurring the lines between rivalry and romance. The series explores their evolving relationship as they navigate the pressures of fame, personal insecurities, and the expectations of their industry.

The narrative delves into themes of competition, identity, and the complexities of human connection. Takato struggles with his pride and the fear of being overshadowed, while Junta grapples with his feelings for Takato and the challenges of being taken seriously as an actor. Their interactions are marked by tension, humor, and moments of vulnerability, as they gradually move from adversaries to partners, both professionally and personally.

Supporting characters, such as their managers and colleagues, provide additional context to the entertainment industry's demands and the personal lives of the protagonists. The series balances its romantic elements with a behind-the-scenes look at the challenges faced by actors, including public scrutiny, media manipulation, and the pursuit of artistic fulfillment. Through its exploration of these themes, "DAKAICHI" offers a nuanced portrayal of love and ambition within the high-stakes world of show business.