romeo and juliet
A 1590s play by William Shakespeare about Romeo Montague and Juliet Capulet, a pair of lovers each from a feuding clan. For the 2007 anime adaptation, see Romeo X Juliet.
The tag ロ澪とジュ律エット ("Romio and Juritsuet") is used on pixiv for fanart of the story arc in K-On! where Class 3-2 put on a production of the play with Akiyama Mio and Tainaka Ritsu as the leads.