Story
“A kiss… Why are you kissing??!!!” Middle schooler Han Si-U is happily dating her boyfriend, Park Geon-U. One day, his next-door neighbor, elementary schooler No Jae-Min, catches Si-U and Geon-U kissing. Shocked, Jae-Min starts following Si-U around from that day on, yelling at him to break up with him…! Where did that cute little kid go who used to follow him around saying he liked her big brother? Why is only this little demon left?
Synopsis via AniList (English).
