Its tells how imperfect, what we thought was a perfect couple. Which is realistic i guess, since there is no such thing as perfection. I would say Teh, didn't really cheat since he did all that for a play and didn't really cheat but he did hide it from Oh-aew, which was very bad. I think its normal to have feelings for other people despite being in a relationship but its only bad if you act on it, which teh technically didn't. I don't know, kinda a grey situation but I would like to look at the brighter side and think that they got back together for the better not for worse cause Teh is still deeply in love with Oh-aew and I think nothing can change that.