Nisekoi: False Love, Vol. 2 (2)

Though Raku and Chitoge's false love is off to a rocky start, they have everyone fooled! However, Raku's still hung up on his childhood sweetheart and wears a pendant around his neck as a memento. But one big problem prevents him from finding the girl whom he promised to marry—he can't remember her name or face! To further complicate matters, Onodera, Raku's current crush who also harbors secret feelings for him, accidentally overhears the two arguing over their false relationship!"