After 2gether and tharntype this is my 3rd most favorite BL drama without any doubt. My expectation was not much after watching so overrated bl dramas but "Theory of Love" is worth watching. The character development of Khai is amazing and I am really impressed. Not only Khai but Third had great character development. From a sad secret lover to a strong lover who knows how to protect his heart and self-respect. Totally liked it.
Bone is great. I think he showed the most maturity in his part of love. I really cried for him in the end. But he deserved a better and got better.
Two is such a good friend. I think his character was perfectly portrayed as a friend, and a lover.
Overall, I liked 4 of them and their friendship. Truly worth it.