In-Woo has been liking Ha-Jun Kwak, who lives next door, since he was little. However, Ha-jun Kwak has a different vibe from In-Woo and is more popular, so they even play in different groups at school. The only connection between In-Woo and Ha-Jun is that they live next door. They were able to become friends because they lived next door, and their relationship continued, but once the college entrance exam is over and they become independent, this relationship will naturally end—In-Woo thinks so. “I wish I could be a senior in high school my whole life.” “That crazy kid.” “Really… ” However, on the day of the college entrance exam, a sudden scream and the sound of someone running away echo through the previously quiet hallway… (Source: Ridibooks, translated)