The king and queen of the fairies,  Oberon and Titania, are in the midst of a marital squabble, so Oberon has her punished by making her fall in love with  the first thing she sees upon waking, which turns out to be a man whose head has been transformed into a donkey's.  
In Act I, Scene ii of this work, several characters are seen rehearsing a play-within-a-play, which they will later perform in Act V. Egeus forbids the marriage of Hermia to her lover Lysander, so they elope by escaping into the forest by  night, where they are followed by Demetrius, who is in turn followed by Helena. The king and queen of the fairies,  Oberon and Titania, are in the midst of a marital squabble, so Oberon has her punished by making her fall in love with  the first thing she sees upon waking, which turns out to be a man whose head has been transformed into a donkey's.  FTP, Puck and Bottom are characters in what comedy by William Shakespeare?
In Act I, Scene ii of this work, several characters are seen rehearsing a play-within-a-play, which they will later perform in Act V. Egeus forbids the marriage of Hermia to her lover Lysander, so they elope by escaping into the forest by  night, where they are followed by Demetrius, who is in turn followed by Helena.
A Midsummer Night's Dream