"Irokoi" is a romantic comedy manga that centers around the lives of high school students navigating the complexities of love, relationships, and personal growth. The story primarily revolves around Raku Ichijou, the heir to a yakuza family, and Chitoge Kirisaki, the daughter of a powerful gang leader. Due to a childhood promise, Raku carries a pendant with a key that is meant to unlock the heart of his true love. However, he cannot remember the identity of the girl he made the promise with, as it happened when he was very young.

Chitoge and Raku are forced into a fake relationship to maintain peace between their feuding families. Despite their initial animosity and constant bickering, they gradually develop a deeper connection. The narrative introduces a love triangle when Onodera Kosaki, Raku’s childhood friend and classmate, is revealed to also have a pendant that matches Raku’s key. This revelation complicates Raku’s feelings, as he has harbored a long-standing crush on Kosaki but begins to develop genuine feelings for Chitoge.

The series explores themes of unrequited love, misunderstandings, and the challenges of adolescence. Supporting characters, such as Tsugumi Seishirou, a skilled bodyguard with feelings for Chitoge, and Marika Tachibana, a persistent and wealthy girl determined to marry Raku, add further layers to the romantic entanglements. The story balances humor with emotional moments, often highlighting the characters’ struggles to reconcile their feelings with their circumstances.

As the plot progresses, Raku and Chitoge’s relationship evolves, and the mystery of the pendant’s true owner becomes a central focus. The series delves into the characters’ backstories, revealing how their pasts shape their present relationships. The narrative maintains a lighthearted tone while addressing the complexities of love and loyalty, culminating in a resolution that ties together the various romantic threads and resolves the central mystery of the pendant.