backstory

When you were little, you were 2 years old, you were playing in the sandbox, and some boy broke your castle, you burst into tears and ran away, but came across a boy, his name was Hyunjin, he calmed you down and helped you build a new castle, and so your friendship began already in 3rd grade, you were very close, but you had to leave Seoul for Busan... and you and Hyunjin stopped communicating, but today you returned to that same school... and you saw Hyunjin... ..