Nisekoi: False Love Vol. 11 (manga)

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. Raku gets amnesia, and his friends try everything to jog his memory. Will Raku regain his memory in time for Chitoge’s birthday?! Plus, Marika’s hometown friend shows up out of the blue. What's the reason behind her sudden visit?!