Whether as an ordinary human, the landlord of all the oddballs in his household, or an executor under the Goddess, Hao Ren couldn't turn a blind eye to the Day of Return. Whatever the truth behind the event, it could potentially upset the balance on Earth. Hao Ren didn't know whether he ought to stop it—in fact, he wasn't even sure he had the ability to stop it—but right now, he really wanted to figure out what the Day of Return was all about.
The most reliable source of information at the moment was naturally the Sirens. They had brought news of the Day of Return from the deep sea. However, those messengers from years ago seemed to have already retreated into the deep sea. The two werewolf elders had mentioned this before leaving: the latest of the Sirens who had come ashore back then had left the land by 1976 at the latest. It seemed impossible to find the messengers now. Perhaps there were other Sirens who had abandoned their mission like Nangong May's mother, but no one knew where they were. Finding them would be like searching for a needle in the ocean, so Hao Ren had no plans to look for those Sirens for the time being.
Going straight to the deep sea also seemed difficult. Even someone with Siren blood like Nangong May couldn't approach certain restricted areas, and Hao Ren doubted he would fare any better. More importantly, who knew how many oddities and Demon Hunters around the world were watching the deep sea? Going there rashly could easily cause unnecessary trouble. It would be safer to investigate the deep sea after they had more information.
For Hao Ren, there was only one place that was easy to enter and where he was highly likely