In a world reshaped by coronavirus, everything around grad student Sakutaro seems to have changed...except for himself. But the gears of history start to turn when Buddha’s emissary suddenly appoints him as ‘History’s Mentalist’! While taken aback by the unexpected flaws of the great historical figures he encounters, Sakutaro begins to (hopefully) reexamine himself in the face of their earnest endeavors... Can he survive the challenges of both the past and the present?!