Jakusha Youkai Musubi-chan

Two decades have passed since supernatural beings started interacting with humans. Musubi-chan, a demon who arrived in the human world full of enthusiasm, unexpectedly reaches the age of 30. After spending 20 years in seclusion, she has grown weak and is no longer the powerful monster she once was. The story focuses on her efforts to reintegrate into society, navigating challenges with both humans and other supernatural creatures.