Isei wo yosetsukenai mahō

Isei wo yosetsukenai mahō (Japanese: 異性を寄せ付けない魔法いせいをよせつけないまほう Romaji: isei wo yosetsukenai mahō, translated as Hated by the opposite sex) is thought to be a black magic curse. This is not the name of the spell, the Power Words are unknown.

The spell delivers exactly what is expected: Its target becomes hated by the members of the opposite sex, to the point of inspiring panic and disgust. The curse is somewhat easy to break, using Flow Break is usually sufficient.