There has been much conflict between the races of the 'Humas', the 'Gabranth', and the 'Evila'. To combat the 'Evila' race's Demon King, the kingdom summons five high school students from 21st century Japan who have the power of Heroes.
However, only four out of five of those students had the status title of 'Hero'.
Okamura Hiiro was summoned by accident since he sat near the…