Homeward Bound is not a true story. It's a fictional tale crafted to evoke emotions and tell an engaging adventure. The characters and events were imagined by the writers.
Homeward Visual Novel is not a virus. It's most likely a legitimate piece of software. Viruses have specific characteristics that this doesn't possess.
A 'homeward visual novel' might have a plot centered around the concept of homecoming. It could involve characters who are displaced or lost, either physically or metaphorically. The story might unfold as they strive to return to a place they consider home. There could be various obstacles in their path, like difficult terrains in a literal sense if it has an adventure - like setting, or emotional and social barriers in a more psychological or relationship - based context. They may meet different people during their journey homeward, and these interactions could shape their understanding of home and themselves.