"Free! - Eternal Summer" is the second season of the anime series "Free!" It continues the story of a group of high school boys who are passionate about competitive swimming. The series focuses on their friendships, rivalries, and personal growth as they prepare for the upcoming swimming competitions. The main characters include Haruka Nanase, Makoto Tachibana, Rin Matsuoka, and Nagisa Hazuki. The season explores their relationships and challenges, highlighting themes of teamwork and perseverance. The animation features vibrant visuals and dynamic swimming scenes, appealing to both sports enthusiasts and fans of character-driven stories.