Nisekoi: False Love, Volume 5: Typhoon — Naoshi Komi

Love triangle! Comedic antics!! Gang warfare?! You won't want to miss out on Weekly Shonen Jump's laugh-out-loud feel-good manga series!

It's hate at first sight when Raku Ichijo first meets Chitoge Kirisaki. But much to their chagrin, the two are forced into a false love relationship to keep the peace between their feuding gangster families. Meanwhile, Raku's still hung up over the girl he made a promise with ten years ago, keeping a pendant around his neck as a memento. The girl, in turn, holds the key that opens the pendant. To Raku's surprise, he discovers three girls have keys from a promise they also made ten years ago -- Chitoge, his current crush Onodera, and the police chief's daughter Marika!