Luna is a slightly overweight girl with low self-confidence. Dejectedly, she looks at herself in the mirror as she thinks about the coming Summer... she really should start a diet to feel more comfortable showing off in public! First, she weighs herself to figure out where to start.  No more junk food, pasta, ramen noodles, pizza! But she's already so hungry... some carrots will be good as a snack.  Too bad the poor girl can't finish her sad snack that her belly starts hurting so bad! What's going on? She feels so... bloated! The T-shirt that until a few moments before was falling softly over her body is now tight and snug. Her shorts-oh, damn, the button has popped open all of a sudden!  Incredulous, she climbs back onto the scale... within minutes, the figure on the display has increased! And she has no trouble believing it: her belly has never been so swollen and fat.  She tries futilely to cover it with the fabric of her now too-small T-shirt for such a prominent abdomen.  Her Summer is already ruined!