"First Try!" is a sports manga centered around the world of competitive swimming, focusing on the journey of its protagonist, Haruto Tachibana, a high school student with a natural talent for the sport. Haruto, who initially joins the swimming club on a whim, quickly discovers his potential after a casual race against the team’s ace, Riku Shindo. This encounter sparks a rivalry and a deep passion for swimming, pushing Haruto to refine his skills and compete at higher levels.

The narrative explores Haruto’s growth as he transitions from a novice to a serious competitor, facing challenges such as rigorous training, self-doubt, and the pressure of high-stakes competitions. His relationship with Riku evolves from rivalry to mutual respect, as both swimmers push each other to excel. The story also delves into the dynamics of the swimming team, highlighting the camaraderie and conflicts among teammates, each with their own goals and struggles.

Supporting characters play significant roles in Haruto’s development. Coach Akari Fujimoto, a former professional swimmer, provides mentorship and guidance, while Haruto’s childhood friend, Yui Nakamura, offers emotional support and a grounded perspective. The series balances intense swimming competitions with moments of personal reflection, showcasing the physical and emotional demands of the sport.

As Haruto progresses, he competes in regional and national tournaments, facing formidable opponents who challenge his abilities and determination. The manga emphasizes the importance of perseverance, teamwork, and self-discovery, capturing the highs and lows of competitive swimming. Through its detailed portrayal of training regimens, race strategies, and the psychological aspects of competition, "First Try!" offers an engaging and authentic look into the world of sports.