Pasu was abandoned by his parents since birth. They left him to be raised by the maids in the mansion they left behind.

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Up till he was 14, he had barely any contact with other people, barely left the house and was home schooled.

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He grew cold, brutally honest, bratty and offensive. Spoiled. He didn't believe he was the center of the world although; he just hated and sneakily avoided anything that required him to change his own good.

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Up until he met a certain left behind alien.

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For some reason as he saw the humanoid, he felt an emotion that he never in his life could even imagine.

Pity.

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Even now he doesn't know what made him; but he let the adult Byo Xianyong live in his mansion alongside him.

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Throughout the years they spent together, they both discovered a lot about each other, changed, developed, and eventually fell in love with.