Viki is a free app ..it’s just that some content is not available in some regions...But it is there on Dramacool ..search on Google ‘It’s okay that’s love Dramacool’ then you will get it
I’m also an Indian..So I can really relate to all that you said and I also faced the same confusions when I started watching C,K,T dramas. At first, I was shocked like how can they call their boyfriend “brother” because if that would have happened in India that would have been a complete gone case..LOL!