An AI car that communicates like a friend, 'Watchcar'. The protagonist 'Roy', while participating in the 'Watchcar Battle League' that determines the world champion with 'Avan' of Watchcar, accidentally enters the 'Racing Battle' in which only popular players can participate. Roy's fiery dash to win the battle continues, and he gradually gets closer to his friend 'Ari', whom he has had a long-time crush on… Roy's fiery dash towards victory and love begins!