Tomoki Yuuki, a seemingly normal high school student who gives off a menacing vibe, finds himself ostracized by his peers except for Ike Haruma, the flawless ‘perfect guy’ type. Tomoki's mundane school life takes an unexpected turn when Haruma's popular sister confesses to him, leading to a peculiar arrangement of becoming her ‘fake boyfriend’ to assist Haruma. As Tomoki navigates this bizarre situation, he soon becomes entangled with Haruma's childhood friend and his attractive teacher, blurring the lines between reality and a surreal romantic comedy. Amidst the whirlwind of attention from these unexpected characters, Tomoki questions if this newfound popularity is simply a dream scenario for a typical side character like himself.