Dark Thought and some Thoughts

Could Age Regression in anime be a subtle sign that Japan really is concern with the birth rate with their own nation?  

I wouldn't surprise it is since it's really bad right now. Though looking back at some animes I have watch AR has been coming up in a lot of them. So I wouldn't be surprised honestly.

Though if you wanted to AR by music then give it something that has to do with age like this "The Serenade of Youth" but age regression through a song called lullaby just baffles me. It more sounds like that the song should have put people to sleep since that's what lullabies are for but nope age regression...

I mean it would have been funny if the it put to sleep that why he can never meet is precious Beethoven senpai and we will just keep on laughing, but since they did age regression it just makes it really disturbing.

I go what the Douge said that comedy is based on misery. If you want a really funny anime then go watch Nyankoi. If you want AR by music at least do it in a way it make scene since it seemed to only just appear randomly in the episode.