It definitely still exists. Some familial companies marry each other to try and have a stable relationship in business, I've seen it myself.
You just can't FORCE the marriage. But most of the time the bride and groom they accept it as part of "family duty".
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This seems like the kind of love story that's gonna build a lot of frustration in me. I can tell from experience...
Page 20 second to last panel looks like "if we saw eachothers" should be "if you saw eachothers" (or "if you met up again") (i.e. if he meets his dream girl again he should at least have the experience to treat her well).