“Hey, sensei...play with me?” Straight-laced Math teacher Isa is shocked by this proposition, but quickly regains enough composure to give the offending student, Homura, a good whipping. Undaunted, the brazen Homura continues to shower sexual advances upon the hapless Isa every chance he gets. Sensible and rational as the discipline he teaches, Isa calmly dismisses and rebuffs the student’s passionate display. But when Isa glimpses sincerity in Homura’s eyes and realizes that his pupil’s confession of love is true, his cool demeanor begins to falter...