Both movies have innocent 'supernatural' guys, where the girl is the one who teaches/taught them love in a very simple, a bit slow, but in cute way. The boy is fully captured by this girl and remains loyal to them in an innocent way for what seems forever. The endings are both tear jerkers and leaves you reflecting on it afterward. It's really a bit difficult to explain, but if you liked the way the boy and the girl loved each other in "A Werewolf Boy", it is literally the same feeling throughout "Boy from Wonderland".
The only main difference is that "A Boy From Wonderland" has a bit of an eerie feeling mixing in with the beauty of it. However, it's all explained in the end. Please sit through this film, it's the only one I can compare to "A Werewolf Boy".