Kiss×Sis manga author Bow Ditama revealed some news. According to him on Twitter , the last two chapters of the manga are being finalized.
Therefore, we do not have a confirmed publication date.
Synopsis:
Keita Suminoe is a senior in elementary school who lives with his father, stepmother, and two older twin half-sisters, Ako and Riko . Since their parents' remarriage in childhood, the siblings have felt a warm and loving bond with each other.
Kiss x Sis launched in Bessatsu Young Magazine in December 2005, ending in Monthly Young Magazine in December 2009.
Finally, Kiss×Sis gained a 12-episode OAD series between 2008 and 2015 and a 12-episode anime series that aired from April 4, 2010 to June 21, 2010.