"If by Chance"

Mon is a British-thai student who just graduated in highschool and after vacation her brother Dew convince her to stay in Thailand after the conflict with her and her mother for the past 6 years.She'll be back in Thailand and she'll soon meet Khun Sam,his brother's bestfriend.Khum Sam and Mon's relationship starts with a love-hate friendship, there's no day they aren't fighting like cats and dogs soon as time goes by Dew himself is slowly by slowly feeling something towards when she and Mon are also close to each other and barely argues and when Dew reach out Mon for help it turns out that both siblings had the same feelings towards Khun Sam but only love one person,who do you think it is?what will happened to the siblings relationship?are there any consequences?or Khun Sam wouldn't both one but will choose both?