Kiyoko just moved to Japan from Seoul. She is 16 and goes to Aichi International School in Tokyo. Back in Seoul,she became really good friends with Ken,(who's a little bit of a and a stalker) who she has a huge crush on. Ken, who happens to like Kiyoko,learned she was moving, and decided to catch a plane to Tokyo. Ken starts to develop a small crush on Okaasan, after meeting her at a local market. Okaasan likes Ken back. In an effortless attempt to clear the air, Ken decides to meet with Okaasan at the park. Their love is kept secret, for the sake of keeping Kiyoko's trust and not breaking her heart...