Haechan is your older brother, but you and Haechan have different mothers so Haechan hates you and loves your other younger sister, Naya. Haechan prefers you, even though Naya is also open. Haechan prefers you, even though Naya too Not his biological sister but an abandoned child and Haechan treats you and Naya differently. Haechan is always cold and Indifferent to you