I let Haseo answer more in details since he is the writer.
what I know is that u can pick two routes. love or corruption. some girls have only love and a few only corruption.
corruption is a lot of things.
we have a tipboard in "recollection" room that tells u what to expect for each girl. so if u read that u should know how to play.
of what I know theres no heavy ntr in the game. if u go corruption path its mostly u being a dick, u sell them for profit or just for your own amusement. also u decide for each girl what to do. so u can mix freely.
and as I explained, it is avoidable since u decide how to play for each girl.
and do not worry if a girl is "corruption" only (very few) as I explained, corruption is a lot of things.
so, people can "complain" here and there. but that is mostly because they didn't read. they fast-forward, don't read the warnings and find themselves in a corruption situation. if u read properly when the message popup what "route" to choose, u will not experience the corruption path.
also, theres bug sometimes. its not deliberated to make u suffer. if so, just ask Haseo to fix your .sav
We can fix almost anything if u did a mistake.