When your descendants relatives visit your final resting place for generations, they will find it among the other graves by the mark of your waifu. In this case, it's a veritable harem of waifu forming the cast of Love Live!, an enormously popular anime series about high school girls who form an idol singing group in order to save their school from being closed.
Twitter user @t_hide is a stone engraver. He has recently turned his craft to inscribing Love Live! characters on stone and glass. He does incredibly precise work that will make an anime fan the envy of every other resident of a cemetery. You can see more photos of his work at Rocket News 24.