There are two types of Love Gu, one is called the Lovesick Gu, which is used on men who are not very much in love with the practitioner. This way, the man will constantly miss the one who applied the Gu, day and night, barely eating or drinking. After marriage, they would still be affectionate, but the man will often be in a daze, so relying on him to make money and support the family is out of the question.
The other type is the Love Flower Gu, which is given to the lover to consume. If the lover's affections change, they will suffer excruciating pain once a month. The pain is truly too cruel...
Many who changed their hearts eventually couldn't bear it and ended up committing suicide.
"Weren't you afraid that the secretary would get angry when you used the Gu? Weren't you afraid of having to read a self-criticism in his presence? Did you use the Lovesick Gu or the Love Flower Gu?"