There's this "substitute" type; rich girl/guy's crush dumps them because they're poor/ugly/in trouble at the time, and then goes overseas for like 5 years, rich girl/guy then gets hot/rich/powerful, finds MC, who looks like crush, starts dating them as a "substitute", and then real deal comes back, causing MC to be dumped, but then rich girl/guy eventually regrets...
isn't this FGO Kiyohime???
isn't this FGO Kiyohime???

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