In the novel Fantasy Sonata, the male protagonist has a dual personality because he witnessed the tragic scene of his father brutally killing the heroine's entire family when he was a child.All this caused great irritation and harm to the male protagonist.

Recalling the unforgettable experience in detail, the protagonist's father was involved in a rebellion conspiracy.In order to achieve his goal, the father mercilessly forced his son to witness how he killed the heroine's entire family.Facing such a horrific and cruel scene, the male protagonist endured tremendous pressure and torture.Such stimulation caused his inner defense to be broken down, and the hidden consciousness of his second personality began to be awakened.

Since then, the male protagonist has split into two personalities, one is a gentle and kind personality, and the other is a crazy and twisted personality.These two personalities are intertwined with his daily life, sometimes becoming one, sometimes fighting each other.Different personalities are deeply in love with the heroine, but show it in completely different ways.

The gentle and kind personality shows endless care and love for the heroine. He cares for every inch of the heroine's skin through gentle and considerate words and actions.He longs to provide her with a safe and comfortable environment, hoping to be her safe haven.

And the crazy and twisted personality is lost in morbid love.Unable to control his emotions, he turns his love to extremes and fanaticism.The love he showed was not true love, but a fierce obsession and possessiveness.He tries hard to get the heroine to accept his morbid love, and he does whatever it takes to do so.

As the plot develops, a complex and tangled triangle relationship develops between the hero and the heroine.The heroine is torn between two personalities and is confused by these two completely different loves.She deeply loves the gentle and kind side and longs to spend her life with him; however, she is also afraid of the crazy and twisted side, and is terrified and disgusted by his emotions.

The novel - Fantasy Sonata - shows the entanglement and contradiction between love and the dark side of psychology through the dual personality of the male protagonist.By describing the inner struggles and conflicts of the male protagonist, the author reveals the hidden and complex aspects of human nature.This makes readers think deeply and deeply about the definition and boundaries of love.