Nagi once longed to be a hero. As he grew up, he learned about reality, and as a high school student, Nagi wanted to stay out of sight and live a quiet life. However, he is suddenly summoned by a blond, tall, and handsome senior whom he doesn't recognize. It turns out to be his childhood friend, Kaito! Nagi is surprised to see the change in Kaito, who used to be a timid kid, but he tries to leave quietly, not wanting to be seen as a conspicuous stranger. Then, with the same tearful face as before, he begs him to have lunch with him...? This is the start of a coming-of-age love comedy between a cynical, plain DK and a single-minded, puppy-dog type, flashy DK! 3i341f