Introverted high school student, Mugi, falls in love with his neighbor, Iyo, who always greets him kindly. One day, Mugi was kissed suddenly by Iyo, who has a different atmosphere than usual. Which is the real Iyo, was he a gentleman or a playboy? While visiting at Iyo’s place one night, Mugi learned that Iyo has a twin brother, Kiyo. While being...