Unfortunately I can't think of any game quite like Corruption, especially in regards to the game flow, with the corruption levels and stuff.
But I have two recommendations I feel you might like. Both are japanese games, complete and English translated.
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(also known as "Fallen Wife") - has a shota protagonist dominating older women. He's the son of a man who trained prostitues and sex slaves for a shady club (called Under Eden, I wonder if that's where Mr. C got the name for the Eden place in Corruption) and he still has connections there to get lust enhancing-drugs and other stuff. He targets his adoptive mother (his father and mother died in an accident) and his school teacher, both married women. As they get more corrupted they start dressing lewder, but it's something that comes in late game and nowhere as proeminent as in a game like Corruption. They start out reluctant but get increasingly unable to resist sex and eventually do things in public places and in front of others (and of their husbands, of course). Also here's a warning: the protagonist doesn't mind prostituting the two. I think it can be avoided but most of the public stuff does involve sex with other people (because the protagonsit told them to, there's no NTR in this).
While smaller in scope (and it's a choice-based VN, not a map navigation one) I think this game's content is pretty close to Corruption's spirit.
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- This game has 6 girls to corrupt, 4 are adult teachers and two are high school student (though one of them is a well-endowed ojou-sama type, so only one girl really feels like a teen). The protagonist is also a high school student. Unlike Corruption or Ochiru Hitozuma, he doesn't use any kind of magic or drug, he just has great sexual skill - even if the women try to resist, their bodies react and eventually crave the pleasure he can give them. The gameplay has map movement and time management elements, as the protagonist must chose which girls he'll approach in order to learn more about them (and weaknesses to exploid) and plot to assault and train them. The corruption in this game is more in the mental side of things - the girls becoming more submissive, horny and perverted the more the protagonist goes after them, discovering fetishes and turn ons they didn't know they had and eventually becoming loyal sex slaves. But there isn't a permanent visual change like in Corruption, the girls will keep the facade of normal, well-adjusted people even after they became sluts completely obsessed with sex, dropping it when the protagonist is around. Each of the 6 girls has her own ending, and depending on who you go after and in which order you can unlock extra scenes and new endings with two or even all of them at the same time.
