Just looked at the SONY page. Based off of Google Translate, I'm guessing that the B-side is SCANDAL IN THE HOUSE. They might have written it themselves, but I'm not sure. From Translate, it said for the members were in charge of the lead vocals for the first time...and the might not be playing instruments...? I don't know, but that's the only thing I can tell. My Japanese isn't great, so...I might not be right. It could be a dancing number and the limited edition (for the album) has a dancing number for this song...I think. Either way, that song is possibly the B-side. I don't know. Could someone maybe double check this information? I'm kind of curious.