Cinnamon Milk TEA's manga / #Cheating/Infidelity(2)

The tragic end of Yeon Janghwa was so unexpected !! Can't believe she isn't the lead! Yeon Hong-ryeon (the evil twin aka the real lead of this webtoon) and that trashy ex-BF (he got what he deserves) he was just so gross happily cheating on Janghwa and making her miserable with no regrets! One complain, the lack of explication and internal monolog there's a lot I don't understand.