ワン★オポ！vol.04 (Wonderful★Opportunity! vol.04)

==Background==
Wonderful★Opportunity! vol.04 is Wonderful☆Opportunity's fourth compilation album, consisting of 10 songs.
Wonderful☆Opportunity later remastered this album under the title Wonderful★Opportunity! vol.04.1 in 2017.
==Preceding and succeeding albums==
Wonderful Opportunity Album Vol 3.jpg|Wonderful★Opportunity! vol.03
Wanopo vol 5 album.jpg|Wonderful★Opportunity! vol.05
 
== Track Listing ==
==Other media appearances==
===Events===
This album was released during THE VOC@LOID MASTER 15.
==External links==
===Official===
===Unofficial===
Category:Albums
Category:Japanese albums
Category:Albums featuring Kagamine Rin
Category:Albums featuring Kagamine Len