Shuzenji Kyotarou, Kirishima Ryoma, Wakura Nanao, Manza Taiko, and Dogo Ichiroku, who claim to be the "Earth Defense Club" and do not fight anything, but enjoy a lazy daily life. One day, the five meet Karurus, who claims to be the first prince of the Honyaraland Honyara royal family, while soaking in Kurotamayu. Karurus, who came to rule the earth happily, appointed the Knights of Karurus Happy Kiss to help the defense team. Suddenly fighting a mysterious monster who rampages at school ...!?
「地球防衛部」を名乗り、かといって何かと戦うわけでもなく、けだるげな日常を謳歌する修善寺鏡太郎、霧島龍馬、和倉七緒、万座太子、道後一六。ある日、５人は黒玉湯に浸かっているときにホニャラランドホニャラ王家の第一王子を名乗るカルルスと出会う。地球をハッピーに統治しにきたというカルルスは防衛部員を手伝いとしてカルルス騎士団ハッピーキッスに勝手に任命。学校で暴れる謎の怪人といきなり戦うことに……!?
Novos personagens são apresentados, e dessa vez, eles serão os cavaleiros mágicos.
