I'm looking for manga that involves some sort of mind corruption (in lack of a better term).
Now onto the explanation. What I'm looking for is something where a "normal" character due to some third party influence changes (themselves or their feelings) in a "bad" way. They change in a way that they openly show their lack of care or betrayal to the people closest to them. The example of this would be that engaged woman in golden boy. The only examples I have are the forementioned golden boy and some hentai like suiyobi no houkago or true blue. It's just that this time I'd like them to "change" back but find themselves shunned by those same people they abandoned for whatever reasons.
Some examples I'd preferred would be lovers or parents. He/she abandons their partner or parents don't show care for their child.
I just remembered some more "mild" examples. The thing that girl did to her boyfriend (the manager) in B.O.D.Y. or the mother in Ristorante paradiso (I just want it more...hmm...heavy).
And no hentai and yaoi.
Thanks.