Địa Ngục Đọa Đày, Grave Torture Vietsub

Sita was a teenager when she witnessed her parents died of a suicide bombing in the name of religion. She then spent her life to find the most evil person, and when that they die she will bury herself with that person, to prove that punishment in the grave that was mentioned by religion doesn't exist thus religion isn't true. But there will be dire consequences for those who don't believe.