The renders are definitely the highlight of this VN; extremely detailed and lively backgrounds give life to nearly every scene. Characters (especially the women) are insanely well done and the guys (other than MC) are not a waste of space that women trip over in order to get to you.
The story gets you engrossed in not just the main mystery of who-dun-it to your mother (which is barely explicitly mentioned, you wouldn't even know the blood relationships if you don't pay attention to the dialogue, it seems somehow too vague on purpose for whatever reason) but also most other, 'side' characters you meet with agendas of their own.
There is an NTR question at the start of the game, however, as of 0.3 content update, there is still none whatsoever implemented into the actual game. Some dialogue hints at the fringe possibility down the line, but it remains unclear if this is an eventuality; or a remnant of the pre-rework version. NTR haters, Proceed with caution!
Why 3/5? Because this game has been developing for around 6 years now. And I personally consider that timeline more than enough for a finished product - which this is certainly not. Keep in mind that the developer has two games running concurrently, so do be careful if you want to support the developer thinking that it will speed up the process. Sometimes, throwing money at a problem won't achieve anything at all.