There are 12 “あ・い・う・え・おにぎり” Vocal accompaniments.
There are sounds such as “あ・い・う・え・おにぎり by 雄輝”, “あ・い・う・え・おにぎり by 魅美愛(みうあ)” and so on.
Other popular musical parts of “あ・い・う・え・おにぎり”