"Kimagure Graffiti" is a slice-of-life manga series that centers around the daily life of Itsuki Iba, a high school student who lives alone in an apartment while her parents work overseas. The story explores her struggles with cooking and maintaining a balanced lifestyle, as she often relies on instant meals and lacks culinary skills. Her life takes a turn when Ryou Machiko, a cheerful and energetic girl from her school, discovers Itsuki's predicament and decides to help her learn how to cook. Ryou, who is passionate about food and cooking, begins visiting Itsuki's apartment regularly to prepare meals and teach her the basics of cooking.

The narrative unfolds through a series of episodic chapters, each focusing on different recipes, cooking techniques, and the growing friendship between Itsuki and Ryou. As the story progresses, Itsuki gradually becomes more confident in the kitchen, experimenting with new dishes and developing a deeper appreciation for homemade meals. The manga also highlights the cultural and emotional significance of food, as the characters bond over shared meals and exchange stories about their lives.

Supporting characters, such as Itsuki's classmates and neighbors, occasionally appear to add variety to the story. These interactions often lead to new culinary experiences or challenges, further enriching the narrative. The manga maintains a lighthearted and wholesome tone, emphasizing themes of friendship, self-improvement, and the joy of cooking. Through its focus on food and personal growth, "Kimagure Graffiti" offers a heartwarming and relatable portrayal of everyday life.