Shousetsu Digimon Adventure

In the summer of 1999, seven children attending summer camp are unexpectedly taken into a new and unfamiliar world, where they meet seven Digimon who have been waiting for them. The children and their Digimon set out to figure out where they are and find a way home, fighting for survival against the other hostile Digimon who inhabit the world, but when they learn that have been brought into the Digital World for a higher purpose, they accept the responsibility of resolving the crisis facing it, as well as the role of the "Chosen Children." Even as their travels continue and they face the powerful evil Digimon who threaten both the Digital World and their own world, they also face their own inner demons and begin to mature, and as they do, their partner Digimon become able to evolve into stronger and stronger forms.

(Source: Wikimon)