Shadow series book 4 [ slow updates ]

The entire kingdom of hell, the planet of afterlife, was busy preparing for the war with Helvina, the planet of pre-life. During that time, Y/n meets a man named Jungkook in hell. Even though he appeared normal at the first sight, he became mysterious with time. What was Jungkook hiding? Also, at the same time, Taehyung, the king of hell, desperately tries to awaken his half-sister, Sana, from a 10,000-year-old curse. In that course, he comes across y/n, who he thinks could possibly be someone from the past. If not, why does she remind him of a special someone from 10,000 years back?