
Because Junki is the main character and he gets more screen than Aoi does so most of the time it's in Korean. Junki didn't attempt to speak a lot of Japanese but it's Aoi who's the one that attempt to speak Korean more.
What made it a not so good film was that because of the different language, Korean and Japanese also the plot is very ordinary. As there isn't much conversation between the two main character because they don't understand each other languages.
Sometimes I get confuse whether they are in Korea or in Japan because it doesn't indicate it on the screen. When I see Junki who's 25 act as a 18 or something student who does kiddy things makes me feel weird although it's cute in a way.
To say the truth the only thing that is worth watching it was for the two main character Aoi and Junki. There lots of cute scene of Junki, I especially likes when his hair is messy.
Rating: 6/10