Oikawa's Ear x Earbud x Reader

(y/n) was just an ordinary person in school. They had recently broken up with their ex-boyfriend, Earbud. (y/n) tries to carry along with their day, but what happens when Oikawa's Ear comes and disrupts their day? And what happens when Earbud finds Oikawa's Ear and (y/n) in a questionable position? A threesome of course ;)