Reason (volume)

is the sixth volume of the Nisekoi series. It has been released in Japan on June 4, 2013 released by Shueisha, and in the United Stated on January 5, 2015 by Viz Media.

Short summary
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 laboring away, Raku can’t help but notice the strained relationship between Chitoge and her mother. Is there anything he can do?

Chapters

 * Chapter 54:
 * Chapter 55:
 * Chapter 56:
 * Chapter 57:
 * Chapter 58:
 * Chapter 59:
 * Chapter 60:
 * Chapter 61:
 * Chapter 62: