Nooch - Abakareta Inbou

The protagonist of the game is a rather nerdy Japanese teenager named Umechiyo, who impatiently awaits the arrival of his friend, a foreign girl named Piliru who comes to visit Japan. However, it appears that Piliru possesses knowledge of shady activities going on in her homeland, the fictional country of Paru. Pursuers are on their way, and the hero has no choice but protect the girl at all costs.

[From Moby Games]