Space☆Dandy

Synopsis

On a deserted planet made entirely of discarded metal and rubbish, Dandy finds a solitary dog. As QT and Meow go about their business, Dandy spends the last few hours of the dog's lifespan playing with her, naming her "Pup", before she eventually dies. Heartbroken by Pup's death, Dandy constructs a rocket to give her a proper burial in space. Putting Pup's death behind them, Meow soon discovers that he picked up a pair of alien fleas from Pup's fur. After the crew comically chase the two throughout the ship, both fleas are inadvertently killed. QT deduces these aliens were responsible for keeping the planet stable and without them, the planet will collapse on itself and form a black hole. Though Dandy and his crew manage to warp away in time, Dr. Gel's ship arrives at the same instant Dandy leaves and winds up being pulled into the black hole.

(Source: Wikipedia)