Board Thread:Wiki Discussion/@comment-3076833-20130403004219/@comment-5532114-20130404213101

Haha, yeah. They are actually a duo, he always makes music and she always draws PVs.

Since she is his sister, I dunno how that happenned, but she became known in the community simply as "Manbou's big sister". Recently though, I think she got tired of it, and has a new nickname, Ryuugu Tsukasa (can't say I don't understand this though.)