After spending time with his buddies, high schooler Sumito becomes fixated on a notebook at the local coffee shop. Responding to a beautifully written note, he begins an interaction with his beloved "girlfriend" without any direct communication. As time goes on, Sumito's feelings for her only intensify. When he learns that the "notebook person" will be visiting the coffee shop, Sumito eagerly rushes over, only to find that his dream girl is actually a towering, 6'2" tall man named Kokuma.