[Machine Translation] Yuto, a high school student, visits a Western school city that gathers students with abilities from all over the world, and is fitted with a strange ring by a mysterious girl. The ring was the prize for winning the battle tournament for the title of "Tenseiin", the ruler of the school! The student council president, Tenseiin Reika, is faced with a ring that has become stuck on Yuto's finger, and decides to give the prize to Yuto as well... but what happens? This is the start of a romantic comedy of battle fantasy in which beautiful girls vie for the ring = the hero.