It's in the eyes ..a lovers look is different form a brother..
Strangely everything else is beautifully done ..I truly like this type of narration -since the days of "we best love S01" ,, the acting was good (the cute Taiwanese style of acting if I may say so),the music too, but I couldn't buy the feeling (sorry).
He is the big brother even in the throes of passion he was "brotherly" .. I don't know if its their way to commit to "slice of life" type of story but the confusion was there and I didn't like it ..
Also the separation period was to emphasize the younger brother genuine feeling but still I felt as if he was just stuck refusing to live his life, and confusing the thin line between gratitude and love.
Moreover, the story is incomplete as both of them carrying a huge emotional baggage , they didn't talk enough with each other about it.