Koishigure ~Happyakuya Chou Yume Monogatari~

Kazuya, a highschooler in the drama club, dreams of being a famous actor in a TV drama someday. One day, when he was searching through the supplies room, he hears someone calling for him and sees a bright sword. He touches it and suddenly finds himself transported to ancient Edo timeline. Soon, he is saved by a beautiful samurai named Iori. Why was Kazuya brought here and what role does he have to play in this ancient drama?