This one was certain more linear compared to AVANTGARDE other past games this time around so there is no point in avoiding the H scenes and trying to keep low corruption stats since the Main Heroine is guaranteed to be corrupted. I am guessing they just wanted a more straight forward H game this time so it is more about how fast you want to complete this game or take your time collecting all H scenes.
Getting the True ending is based on if the player did the side quest to find the 3 stories about the demon girl's past this time around. No need to skip this side quest and just do it on your first run since it provides some decent loot and a MP regen accessory in the first dungeon which is very useful on the Main Character.
I also agree they could have added other romance path for this game (would have gladly chosen the tan skin girl as main choice of romance) but it will have required a lot more work since that means they also have to provide more H scenes to cover each romance path and potential NTR events for those romance paths. If there is one thing about these types of games I've learned is that development is just more focused on one girl mostly because it makes developing the H scenes easier and allow them to release a full base game with less risk of development issues due to having to design the game to cover multiple potential story paths.
