Work Hard! Valentine's Day

'''Work Hard! Valentine's Day' (勤勉！ばれんたいんでー, Kinben! Barentaindē) is the fifth episode of the second season of Isekai Quartet'' and seventeenth episode of the full series overall.

Trivia

 * Darkness references her fight with Kazuma back in Konosuba.
 * This is the second Isekai Quartet episode that has a special holiday ending song.