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>Yoon Hee and Ha Ryu both sacrificed their studies to support their girlfriend/boyfriend college fees
>Both couple have a child out of wedlock
>However, their lover cheats on them and fells in love with rich man/woman
>Both of them plots revenge on them by falling in love with that sibling of the rich man/woman
>Both couple have a child out of wedlock
>However, their lover cheats on them and fells in love with rich man/woman
>Both of them plots revenge on them by falling in love with that sibling of the rich man/woman