Seems like CLAMP will be taking a small break this coming month.

【お知らせ】YA4月号(3/4発売)『ﾄﾞﾗｯｸﾞ&ﾄﾞﾛｯﾌﾟ』休載です。YA : kadokawa.co.jp/ya/　SQ.4月号(3/4発売)『GATE 7』ｼｮｰﾄｺﾐｯｸ(5P)の掲載です。SQ : jumpsq.shueisha.co.jp　@clamp_news

— CLAMPニュース (@CLAMP_news) February 12, 2013

According to the tweet above, Drug & Drop will be taking a break in the next issue of Young Ace magazine. On the other hand, even though GATE 7 is not taking a break next month, the next issue of Jump SQ will carry a short story of 5 pages instead of a regular chapter.

The updated schedule is as follows:

02/04 – Young Ace #3 – Chapter 13.
03/04 – Young Ace #4 – Break.

02/04 – Jump SQ #3 – Chapter 21 (on sale).
03/04 – Jump SQ #4 – Short comic (5 pages).

03/04 – Young Magazine #14 – Chapter 1 or 214 (?).

Not sure if they will resume the chapter counting from where XXXHOLiC Rou ended or start a new counting for XXXHOLiC Rei (sounds more likely to me).