Basically everything you said in your comment is true. Sexy Zone have now been forced to release two singles with only three members (in my personal opinion, you can tell from those three members' faces and reactions that they don't want to be doing it without their groupmates but have no choice), and I'm pretty much in shock over the fact that the management thinks this is okay, too. The first of the two singles sold absolutely horribly, but they've now done so many gimmicks that I'm sure this one will sell with flying colours. I also agree that it would be fine if they called it a sub-unit, but they haven't. Basically the message that they're sending is that Sexy Zone doesn't need those other two members, and that they're useless. This is the first time in the history of Johnny's that something like this has happened (that I know of) and frankly, I find it horrifying and disgusting. That's my personal opinion, but I, like you, am in shock that they're having a group release singles without all the members.