A very satisfying end to the series, especially since most of the stuff from the start of the series was given closure, especially the part where Kyousuke would have to leave the Little Busters because of graduation and forming the Little Busters itself. However, the Secret of the World remains elusive, and amidst the joy in their hearts, especially Riki's, is the worry that those happy days are numbered.
Kyousuke did say that "good things will come to an end eventually".