The chemistry of us is a story that explain the Romantic journey of Ella and kim seojun. Ella is a Canadian girl who went to study in South Korea high school as a student exchange and she faced alot of challenges but rich school popular guy kim seojun fall in love with her and stood by her but the love couldn't continue when Ella decide to go back to canada and graduate high school in canada and kim seojun graduate in seoul but after a year the meet again at university in canada.