the story and the development were simple, and it followed a predictable cliche pattern but it had a beautiful message of brotherhood. Se Ha and Dong Goo were both abandoned as kids and in return they found each other ;) they both completed the other and needed them ;(

Se Ha was jaded and he put alot of walls around him though I could understand that it was hard to see his true heart until the end.
Dong Goo was such a pure precious being, and kwangsoo did such a great job conveying so much without even talking, like Dong Goo's inner thoughts about how Se Ha would be better off without him and the feelings of abandonment and loneliness he had to keep in his heart.
Mi Hyun was also another precious person. she embodied the sweet pure friendship that kinda made the bromance even better. they didn't need to be blood related to become a family TT_TT

Ahn Ji Ho had a small role of young Se Ha but he conveyed so much heartbreaking emotions that solidified the jadedness of old Se Ha so well. I hope he gets more roles soon he has a bright future ahead of him~

the ost was nice especially the end song the 3 main leads sang and I rarely rewatch things