There are three types of people in this world: ordinary people, loved ones, and love brains.
Love brain:
Before falling in love with an "ordinary person", he is no different from an "ordinary person". After falling in love, a heart-shaped pattern appears in both pupils, divided into three types: left pupil, right pupil, and half left and right pupils, representing the role he wants to be in this relationship, such as active and passive.
Only the corresponding "beloved" cannot see the pattern, but if the "beloved" also has feelings for the "love brain", the pattern will be visible. After becoming a "love brain", you can only have strong feelings for the corresponding "beloved" throughout your life, and you will have additional emotions such as loyalty, attachment, and protectiveness for the "beloved".
Beloved:
"Ordinary people" who are attracted by the "love brain". If you give the "Love Brain" the same kind of emotion, you can gain lifelong loyalty and trust from the "Love Brain", and then you can see the heart shape in the "Love Brain"'s eyes, and you can use this to judge the "Love Brain's" mood and mental state, which will automatically dissipate after death.
Ordinary people:
You can see the heart shape in the eyes of the "love brain". Generally, they have no concept of emotions and have a simple mind.
At the same time, there are ways to eliminate the "love brain" in the world, but this will also result in the loss of the most fundamental emotions and desires.
Note:
The left pupil is for attack, the right pupil is for receiving, and the left and right pupils represent both OK or pure love.
Concept: Xue Xiaochun's love story