YEP its indeed slow jet coaster XD
Edit: while it IS disgusting for some people, i think it would be much wiser if you didnt say it that way rui kun, but i guess that's part of his current personality XD (which is a twist here, so people pls dont get too offended with that although it may offend u either a lil bit or greatly)
Edit 2: is this the only chap currently or there's a tankobon already?