i like the ending actually, it has a realistic feeling.
george and parakiss team changed her life forever, she found what she wants to do thanks to them. but for love, george and yukari wasn't fit for each other. they both keep hurting themselves by this relationship. love isn't enough just by itself; love needs much of sacrification, understanding etc. and they aren't the type who'd change or leave some things just because of love. they chose their own life and dreams as their priority, and eventually she found what she wants in love i think because she seems happy with hiro.
but that still doesn't change the fact george had a big influent on her life, as you can see im the final page. people come and go, and george was one of the biggest experiences she had in her life. that's life
yesss dongwoo's brother is the best