Ambiguous tag.
- For the artist formerly tagged here, see Oono (Illust Nagaya).
- For some potential artists named Oono/Ouno: oono_* | *_oono | ouno_* | *_ouno
- For some characters named Oono/Ouno: oono_* | *_oono | ouno_* | *_ouno
- For some copyrights named Oono/Ouno: oono_* | *_oono | ouno_* | *_ouno