Inoue Yosui (57) did a special live Christmas concert in Tokyo at the Ebisu Garden hall on the 23rd of December. About 800 people were in attendance.
Hikki made a special appearance at this concert. Hikki and Yosui are known to be good friends.
Hikki was introduced as a surprise, midconcert as she got up from her seat, and she did a duet with Yousui, singing "Automatic" and "Kohri no sekai".