As someone who prefers realistic endings, I hope it doesn't give us a happy ending for the sake of it. The episode 5 teaser got me a little worried but it was 30 seconds out of over an hour long episode. Even if we don't get a somewhat happy end, I'd take an open end over something sad. (I'm not sure how I'd handle it if it ended like My Ambulance did..)
I'm not sure how I feel about Bas and Oh-aew. I love Bas, he's been such a good friend to Oh-aew.. but I just don't think that's how it's going to end. Perhaps Oh-aew wants to make Teh jealous and Bas agreed or Oh-aew is genuinely trying to get over Teh and is using Bas to do so, I just don't like it. It's very petty if he is trying to make Teh jealous and it's even worse is he's trying to use Bas to get over Teh because, Bas deserves better than that. I also don't think either of them will pass the exam.
On that note, maybe Bas is in on it/he's trying to help Oh-aew. I feel like Teh needs a reality check, he can't admit to anyone that he likes Oh-aew (Apart from in the ep 5 preview where he says to Hoon "Teh likes Oh-aew") and maybe Oh-aew wants to make him realise. But even with this, I don't have any clue what to except.
I just hope the teaser is just baiting us and it wont end as bad as it looks. I'm someone who doesn't really enjoy season 2s or special episodes so I'm praying it'll wrap it up nicely no matter what happens.