@Nari well it's ABO world, so when someone bites you on your neck (usually the back of the neck, because that's location of pheromone glands), it means imprinting 🤷 If it wasn't omega verse, it would be just simple hickey. Also same stuff with imprinting is often shown in guide verse too. It depends on author,but usually when you imprint on someone in omega verse, it means you only react to that person's pheromones