"Love Tyrant" centers around Aino Seiji, a high school student whose life takes a dramatic turn when he encounters Guri, a mischievous cupid from the afterlife. Guri wields the Kiss Note, a magical notebook that forces two people to fall in love if their names are written in it and they share a kiss. After accidentally kissing Seiji, Guri writes his name in the Kiss Note, binding them together. This act also attracts the attention of Akane Hiyama, Seiji’s childhood friend and a yandere who becomes dangerously obsessed with him after discovering the Kiss Note’s effects.

The series explores the chaotic romantic entanglements that arise as Guri, Akane, and other characters vie for Seiji’s affection. Yuzu Kichougasaki, a shy and reserved classmate, also becomes involved when her name is written in the Kiss Note, further complicating Seiji’s life. The narrative delves into the absurd and often comedic consequences of the Kiss Note’s power, as Seiji struggles to navigate the increasingly volatile relationships around him.

Guri’s role as a cupid adds a supernatural layer to the story, as she is tasked with maintaining the balance of love in the mortal world. Her interactions with Seiji and the others often lead to humorous and over-the-top situations, blending elements of romance, fantasy, and slapstick comedy. The series also introduces additional characters, such as Guri’s rival cupid, Rapael, and Seiji’s younger sister, Chisato, who contribute to the escalating chaos.

The plot frequently shifts between lighthearted comedic moments and more dramatic developments, particularly as Akane’s obsessive tendencies and Guri’s unpredictable nature create constant tension. The Kiss Note serves as a central device driving the narrative, with its rules and limitations explored throughout the series. Despite the fantastical premise, the story occasionally touches on themes of genuine affection and the complexities of relationships, albeit in an exaggerated and comedic manner.

"Love Tyrant" balances its romantic and comedic elements with a fast-paced, episodic structure, ensuring a steady stream of absurd scenarios and character-driven humor. The interplay between the main characters, particularly Seiji’s exasperation with Guri’s antics and Akane’s extreme behavior, forms the core of the series’ appeal. The narrative maintains a focus on the consequences of the Kiss Note’s influence, while also exploring the dynamics of love, jealousy, and rivalry in a highly exaggerated and entertaining fashion.