Ep. 9: Lum's ex-fiancé Rei visits Earth, causing chaos with his beast form and charm.

9

"To Kill With Love": Lum's ex-fiancé, Rei, comes to Earth to propose to her. Although he transforms into a huge beast when upset, he is incredibly handsome in his normal state. However, Lum categorically turns him down because she can't stand his gluttony. After a failed attempt to win Lum over and burning with jealousy, Rei chases Ataru and Lum around the local park, causing much mayhem among couples and food-vendors. "Studying Mayhem": Rei shows up at school looking for Lum and food. The girls are charmed by his handsome form, which proves devastating for poor Shutarou. Ran, who is in love with Rei, finds herself fighting for his attention with Lum and even Cherry. When Lum and Ataru return home, Rei has also charmed Mrs. Moroboshi. Later on, Ataru's parents and Lum's mother prepare for the upcoming parent's day at school. (Source: Wikipedia)