Game's title: 御城プロジェクト:RE~CASTLE DEFENSE~ (Oshiro Project:RE - CASTLE DEFENSE, lit. "Castle Project:RE ~CASTLE DEFENSE~")
Oshiro Project:RE, often rendered as Shiro Project:RE and abbreviated as ShiroPro:RE, is a mobile and browser-based tower defence game made by DMM Games. Players control "castle girls" - or moe gijinkas - mostly based on historical buildings from the Japanese feudal period.
It is a renewed version of Oshiro Project, opened in March 2016, with gameplay mechanics and sprites being largely overhauled, and certain girls have been removed or had their art changed.