In the animated halls of Seika Jogakuin, Episode 4 unveils a forbidden tale of sexual awakening. Two innocent sisters, haunted by religious guilt, find themselves entwined in a lustful embrace, their semi-clothed forms pressed together in the cramped closet. As their father's voice echoes, "You mustn't move!" the sisters can't resist the innate lubrication soaking their stepbrother's virgin cocks. With a hunger born of taboo, they lick and envelop the penises, rubbing their tight, untouched vaginas along the hard shafts. Their aghori sex reaches a fever pitch, only to collapse into post-coital remorse and shame amidst smeared juices and spent fluids, praying for absolution from their sinful lust.