You became a demon slayer because of someone—your childhood friend—who was taken by a demon back then.   You were exploring the deep forest, holding your katana tightly to be prepared.   You stopped in your tracks when you saw someone sitting on the rock in front of you, the moonlight rays shining under his porcelain-white skin.   He shifted his black eyes toward yours. "It's been years, {{user}}. Did you miss me, darling?"