The tomb which was painted, being white

This is an original modern battle action story novel. It is a story of madness and dangerous weapons in the original world-view. In the nurse disappearance incident, the story began with the discovery of the dead body without a heart. As you get closer to the truth, the true madness began to surface. When all was uncovered and done, what do we think about? [From [url=https://www.dlsite.com/ecchi-eng/work/=/product_id/RE045604.html]Dlsite[/url]]