A high school teacher is dubbed “Tetsuko the Iron Mask Lady” for adamantly refusing to meddle in her students’ lives or socialize with her colleagues. But she is actually a closet computer in love with a character in a dating sim game. Spending her days divorced from real-life romance, she is one day confronted by a bright but hard-to-figure out, long-haired male student named Murai who confesses his love for her. It is a non-stop romantic comedy pitting a female teacher blindly in love with a fictional character against a male student who will stop at nothing to pursue his teacher’s affections.