Nisekoi: Episode 7: Little Sister
Episode 7 of 12 of Nisekoi:, aired May 21, 2015, 24 minutes. Available with English subtitles and dub where released.
Episode summary
Kosaki's younger sister, Haru, finally enters high school. After hearing unsavory rumors about Raku, Haru is none too pleased about him trying to get close to her sister.