What would you do if an alien in a tiger-skin bikini followed you to school every day? Poor Ataru's life has never returned to normal since the volatile extraterrestrial princess Lum fell for him. Now, Mendo, an excruciatingly wealthy and genteel rival, adds to Ataru's torment. Not to mention an unending stream of extraordinary classroom visitors and educational materials, including incompetent cherry blossom spirits, a legendary nightmare-eating tapir, and a fourth-dimensional camera that breaches alternate realities.