You are not completely wrong, but not correct either.
I love incest and harem and incest-harem... :shrug:
And I don't give a shit about
"taboo".
I disagree on that... the game is just very wordy... and it takes some time for the MC to reconnect to his mother and sisters.
It's also not a nukige... not sure where the fuckfest analogy comes from.
Sure later there is way more sex, but that's to be expected.
I also disagree on the wholesomeness is boring statement by
Bloodguard... I wish we had more wholesome games.
We sail a sea full of NTR-cuckery, rape ,bestiality and god knows what other shit there is out there...
A wholesome island of tranquility is a welcome place to rest.
And for the technical aspects like sound... well the game is old and was K7s first game.
A cult classic like Sisterly Lust also has no sound... heck that game has no animations either...