Unforgettable Darkness of the Stained Spirit

After the divorce lawsuit was settled, a couple went to a hospital famous for brain surgery to undergo memory erasure surgery in order to completely forget each other. The two each completed preoperative consultations and spoke to the hospital about the past and present of their relationship. To prepare materials for the surgery, they must find representative objects that represent their loves and hates. However, in the process of seeking consensus, the two finally discovered that the differences over the years were these increasingly divided common memories.