[truehappiness]

I don't know about that. The digital charts are kind of a mess. Sometimes artists who don't do that well physically do VERY well digitally and vice-versa. She's been up against some very tough digital competition since the digital single came out, so it's normal imo for her to drop. (I don't think anyone would want to have to go against GReeeeN, Kana Nishino, AKB48, Ikemonogakari, and FUNKY MONKEY BABYS all at the same time on the digital charts either)

Since the release of the album is a month away, they really are relying on the TV-CMs for mu-mo and the drama as promotion until she starts doing album-related promotion in March.