Nisekoi:

Raku Ichijo, the unassuming heir to a powerful yakuza syndicate, just wants to live a normal high school life. His dreams of romance are complicated by the sudden appearance of Chitoge Kirisaki, a fiery American transfer student who also happens to be the daughter of a rival gang leader. To prevent an all-out war between their families, Raku and Chitoge are forced into a fake relationship, navigating the hilarious and often chaotic pitfalls of their fabricated romance. As if a pretend girlfriend wasn't enough, Raku holds onto a precious locket and a childhood promise made to a mysterious girl years ago. With new girls entering his life, each with their own potential connection to his past, Raku's quest to uncover the truth behind his promise becomes a delightful tangle of mistaken identities, comedic misunderstandings, and burgeoning feelings.

✦ AI-drafted summary