Oshino-kun is an "idol otaku" who only has eyes for his oshi (his favorite idol). He had planned to dedicate his high school years to supporting her and studying for university entrance exams, with the ultimate goal of moving to Tokyo to see her. But on the very first day of school, Tamao-san—the girl who sits next to him—makes a public confession to him...!? The adorable Tamao-san puts in sweet, earnest effort every single day, hoping to catch his eye. Will Oshino-kun manage to stay on track and keep dedicating his high school life to his oshi...? A pure and sweet youth romantic comedy!