"I'm Gonna Be An Angel" is a 26-episode anime series that blends elements of comedy, drama, and supernatural themes. The story centers on Yuusuke Kudo, a high school student living a relatively ordinary life until he encounters a mysterious girl named Noelle. Noelle claims to be an angel sent to Earth to complete her training and become a full-fledged angel. However, her lack of understanding about human emotions and social norms leads to chaotic and often humorous situations.

Yuusuke reluctantly becomes Noelle's guide, helping her navigate the complexities of human life while also dealing with her unpredictable behavior. Noelle's angelic powers, which include the ability to heal and manipulate objects, often cause unintended consequences, further complicating their daily lives. As the series progresses, the relationship between Yuusuke and Noelle evolves, with Yuusuke gradually becoming more protective of her despite her eccentricities.

The narrative introduces additional characters who play significant roles in the story. These include Yuusuke's childhood friend, Sakura, who harbors feelings for him and becomes jealous of Noelle's presence. Another key character is Michael, a stern and authoritative angel who oversees Noelle's training and frequently intervenes to ensure she stays on track. Michael's interactions with Noelle and Yuusuke often highlight the tension between angelic duties and human emotions.

The plot explores themes of identity, belonging, and the contrast between divine and human perspectives. Noelle's journey to understand humanity is juxtaposed with Yuusuke's growing realization of the importance of empathy and connection. The series balances lighthearted comedic moments with more serious emotional undertones, particularly as Noelle's past and the true nature of her mission are gradually revealed.

As the story unfolds, it becomes clear that Noelle's presence on Earth is tied to a larger celestial conflict, with implications for both the human and angelic realms. The final episodes bring these elements to a head, culminating in a resolution that ties together the personal growth of the characters and the overarching narrative. The series concludes with a mix of closure and open-ended possibilities, leaving room for interpretation regarding the future of its characters.