Nisekoi: False Love Vol. 7 (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. It's almost Christmas, but Chitoge's not in a festive mood because her mother, Hana Kirisaki, is visiting Japan for the winter holidays. Chitoge introduces her false boyfriend to her workaholic mom, who then decides to test his mettle - by making him work as her secretary! While labouring away, Raku can't help but notice the strained relationship between Chitoge and her mother. Is there anything he can do?