Here is the author's twitter in case you want to keep up with the latest news: @kusakawanari Please be respectful and try not to reply in any language other than Japanese as there isn't any official version in any other language (it is REALLY really new after all) and the author will know you're reading illegally somewhere. Google translate is better than plain english! ><
It's Nengara Nenbyaku Ansatsu Renka (The Assassination Love Song Lasting 100 Years/ The 100-year Assassination Love Song)
Currently it's only published physically in the magazine "Hanayume Ai" (花ゆめAi) but you can buy the chapters individually here (electronic version):
https://www.amazon.co.jp/%E8%8A%B1%E3%82%86%E3%82%81Ai-%E5%B9%B4%E5%B9%B4%E7%99%BE%E6%9A%97%E6%AE%BA%E6%81%8B%E6%AD%8C-story01-%E8%8D%89%E5%B7%9D%E7%82%BA-ebook/dp/B07WGK6GRR
They are planning to release the first volume on August 20th.
Here is the author's twitter in case you want to keep up with the latest news: @kusakawanari
Please be respectful and try not to reply in any language other than Japanese as there isn't any official version in any other language (it is REALLY really new after all) and the author will know you're reading illegally somewhere. Google translate is better than plain english! ><