Main character lives alone after this parents death. The mysterious sunglasses left by his father allow protagonist to see the aura of females in estrus. A woman in such state is easily deceived and coerced to sex. He finds himself a rich girlfriend and spends days in luxury. One day a group of women is transferred to the male school protagonist attends. He can't stand the new female teacher pride, so he waits for the day of her estrus to have his revenge.

[From vndbreview]