Kouki is a high school student with a large build who fits in effortlessly with the guys. Yet deep down, he often feels bewildered by the topics of their conversations and finds himself unable to openly share his extensive knowledge of plants. One day, a transfer student named Misaki joins their class. However — for some reason — Misaki remains completely invisible to Kouki alone. While everyone around him interacts with Misaki as if nothing's wrong, Kouki is left wondering: What kind of expressions is he wearing as he speaks to him? Before he knows it, Kouki finds himself constantly tracking Misaki with his eyes; through him, he is destined to confront a world he never knew existed.