@Reikou
Dude, you can't even remember the story ?
Hamin already apologized to Junwoo about this time when she didn't defend him from Taeyang, and she was really feeling bad about it.
That's understandable, Hamin and Junwoo relationship was not the same as now (they didn't know eachother since long), Taeyang was REALLY scary (even more for a girl), and now Taeyang is in their friend group (and she already ordered Taeyang before at the trip, when he lost a game)
It was the only time she didn't protected him, it never happened after anymore.