If 'grudge is real story' means there's a story where a grudge is a central element and is based on real - life, perhaps it could be a story of a feud between two families or individuals. For example, in some historical accounts, there were long - standing grudges between rival clans over land or power. This is real in the sense that these events actually occurred and grudges were held for generations.
A 'grudge is real story' might also be about a personal account. Say someone was wronged in the workplace, like being passed over for a promotion unfairly. They hold a grudge against their boss or the colleague who got the promotion. This is a real - life scenario that can form the basis of a story. The emotions of anger, resentment, and the inability to let go are all real aspects of a grudge, which can make the story feel very real to those who can relate.