The worse part was the rape. Not it's not incest they are not blood related thank goodness for that. As in most countries of the world step siblings are legally allowed to marry.
However this scene was out and out Rape premeditated Rape to be honest. Rape and any kind of sexual assualt or harressement should never be Romanitized period.
There was one tiny hint of some of the consquences of rape. Rape victims will often question and even blame themselves.
I would understand if the Producers/Directors/Script writters where going to show the effects of Rape on the victims and the Rapist was punished but no such luck. This part of the story line was downrigth disgusting and it's about time Asian Series stopped trying to either justify and/or romanatise Rape. There is nothing romantic, beautiful or wonderful about Rape.

The troupe of I'm not gay I only like him needs to be thrown out the window.

The women oh for goodness sake 1 dimensional characters and acting like children, come on they are supposed to be full grown women. We women do not act like that but immature little girls might. Yet another worn out and useless troupe.

Now to the other scene in the bath, clearly under the influence of some 'Date Rape Drug' and the fact his friend stays and watches. To some that might appear strange and weird but we need to look at it in context. He already worries about him otherwise he wouldn't of gone back and burst into the hotel room. This is his close friend. He knows he's still under the influence of the drugs and he's in a bath so I guess he would stay just to make sure he's 'safe'. But there are 2 other things to consider that could also give meaning to why he stays and watches (A) the first stirrings that he might not be completely straight (B) Simple voyeurism on his part.

Personnally I think it's a combination of all 3 possible reasons. As an older woman I've been suprised how many straight guys have admitted to watching a male friend, many confess they did that in their teens others while in the Army so they wouldn't be any embrassement between the 'Bond of Brothers.' As one said, "If you can watch your mate do that and it for doesn't bother you it then theres' nothing you cann't talk about" Hell I've even know guys talking about how they first learnt to kiss by practicing on each other as they were at all male boarding schools and wanted to make sure they could kiss well for when meet their first girlfriends.
As a result of knowing this sort of thing can and does happen it didn't bother me.

I was annoyed with the sexual harressment in the swimming pool ok make an approach but back off when you see the other person is feeling uncomfortable about it.

Will I continue to watch until the end I will simply to continue critiquing the series.

Would I watch it again - NO

Would I recomment it - NO