"My Heavenly Hockey Club" centers on Hana Suzuki, a high school girl who initially joins the school's field hockey club to enjoy the free food provided during club activities. Hana is portrayed as lazy and food-obsessed, often prioritizing meals over physical exertion. However, her life takes an unexpected turn when she becomes entangled with the school's elite boys' hockey team, known as the "Hockey Club." This group is composed of wealthy, handsome, and talented players who are revered by the student body.

The Hockey Club, led by the charismatic and skilled Izumi Oda, initially views Hana as an outsider due to her lack of interest in sports and her unconventional reasons for joining. Despite her initial reluctance, Hana's natural athleticism begins to surface, and she gradually becomes more involved in the team's activities. Her presence challenges the team's dynamics, as her carefree attitude and unorthodox methods contrast with their disciplined and competitive nature. Over time, Hana forms bonds with the team members, including the stoic and serious Takayuki Komori, the playful and flirtatious Kei Tsuchiya, and the quiet yet observant Shun Takasugi.

As the series progresses, Hana's involvement with the Hockey Club deepens, and she begins to take the sport more seriously. The narrative explores themes of personal growth, teamwork, and the clash between privilege and individuality. The team faces various challenges, including rivalries with other schools, internal conflicts, and the pressure to maintain their prestigious reputation. Hana's journey from a disinterested participant to a committed team member serves as the central arc, highlighting her evolving relationships with the club members and her gradual appreciation for the sport.

The manga balances comedic moments with heartfelt interactions, often using Hana's antics and the team's contrasting personalities to create humor. The story also delves into the backgrounds of the Hockey Club members, revealing their motivations and struggles, which adds depth to their characters. Through its blend of sports, comedy, and slice-of-life elements, "My Heavenly Hockey Club" offers a lighthearted yet engaging exploration of friendship, ambition, and self-discovery within the context of high school sports.