Kim Taeyeon and Park Sooyoung who is known as Joy, has been friend ever since their childhood days. They grew up together and went to the same college. They are not the type of girls who's desperate for love so for 18 years in their life, they just focus on their studies. But one fine day, both of them finally fell in love with the 2 guys who are cute, playful yet handsome.

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Byun Baekhyun and Yook Sungjae, has been friend ever since their childhood days too. But baekhyun had to leave everything behind when he was 8 because his parents has some business in California. They kept in contact for all the years baekhyun wasnt in Korea. Baekhyun came back to Korea when he was 14. They continue their journey together and went to the same college together but one fine day, they accidentally fell in love with the 2 girls who are pure, innocent yet cute. Will they succeed in captivate the girls's heart?

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But truthfully,Baekhyun and Sungjae isn't innocent like what you think they gonna be