Sennen Sensou Aigis is a tower defense online browser game available for PC and android and published by DMM.com
The game was originally available only on the R-18 version of DMM.com: DMM.R18, due to the H-scenes that the player can unlock based on an affection system (males have a conversation instead). But as of August 2014, an all-age version was released on DMM.com main site that replaces the H-scenes with conversations.
There was an English version of the game that was launched on Nutaku.net in 2015. It was announced as closing on 31-Oct-2017 with a last date of service of 26-Dec-2017.
