The most you could say in terms of any form of gay association is that Xiao Wu's feelings for his carer? appeared at times to be in the form of a child like crush.

Didn't anyone else see the similarity in Jung's behaviour and actions with that of Kenji (Tadanobu Asano's character) in Last Life in the Universe? Even their appearance was somewhat similar.

Cheers Trev.

P.S. Is Xiao Wu a fairly common Chinese name?