In '虜ノ旋律 -refrain-', Binkanoppai conducts a forbidden symphony of flesh. Unsuspecting schoolgirls, their hymens still intact, find themselves under the spell of their lustful teacher, Highnote. She teases their tender breasts, making their nipples harden. The girls, once shy, now openly touch their wet cunts, eager to please. Highnote, her own pussy dripping, guides them to taste each other's juices. The room echoes with their moans as they're filled with their teacher's creampies, their virginity lost in a chorus of ecstasy.