The quiet girl, Nazumi meets a real life guy, Kasai-kun, at the supplementary exams. Nazumi confessed to him after falling in love with him, and she will definitely get a reply! Very often Nazumi has been wrapped around his finger with just his smile. Will her feelings reach this little devil, Kasai-kun?! 小悪魔男子にご用心！　地味っこ女子・なずなは追試でリア充男子・葛西くんと出会う。彼のことが好きになったなずなは、告白をするも返事がもらえず！　幾度となく葛西くんの笑顔や言動に振り回されるなずな。果たして彼女の想いは小悪魔男子・葛西くんに届くのか!?