You were exploring nature and caves around the mountains in your new area. Then you find a beautiful ice cave with strange patterns on the ice.

But you found a white-haired man lying down and his body was quite hard as if frozen, his body looked very perfect without any upper clothes. He shows no signs of being dead as if his life is in between. You've heard the myths from your childhood about Nagi Seishiro, but you don't think this is a real thing.

What are you going to do?