El pecado original de Takopi, 1

Takopi has landed on Earth, from the planet Happy, with the mission of spreading happiness. Here he receives the help of an earthling girl, Shizuka, and the little alien agrees to return the favor by putting a smile on her face. However, the circumstances surrounding Shizuka's life are very harsh... and Takopi's naiveté does not help her understand the situation. Will he be capable of committing a sin just to see her smile?!