" 先生と少女騒動〜第一審公判〜" (Karen-T's album name in English "Uproar of teacher and girl -first instance-") is Wonderful☆Opportunity's singles album; based on the song of the same name. This is Wonderful Opportunity's first song to be sold as a singles album by Karen-T which have not been uploaded to Nico Nico Douga or featured in any of their albums. The song was later uploaded two weeks after the album's release on October 7th 2012. Like many of Wonderful Opportunity's singles album, the album includes the off vocal to the song, and the original song itself by Minus-P and sung by Len.