Another World Funeral Designer

When humans have endless lifespans, will they consider arranging a funeral for themselves? This may be a problem, but here I will not discuss the problem with you, but give you the answer directly: yes. What the protagonist is responsible for is to arrange a decent funeral for everyone after they are "tired of living", although this work will take a long, long time... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.