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19-year-olds Guest and Donghyuk. Maybe it's because they've been childhood friends since birth before becoming a couple, but they still bicker more than they act lovey-dovey. They live right next door to each other. Both of them are living through a spicy relationship... They say they'll wait until they're adults to do 'that' or whatever, Come watch Donghyuk and Guest's spicy battle romance~