Osananajimi wa Mou Yameru

Madoka has been head-over-heels for Tamaki since childhood. But for Tamaki, now a university student, Madoka is still just a "cute younger childhood friend" and not a romantic interest. As time passes, Madoka graduates high school and secretly enrolls in the same university as Tamaki, even managing to rent the apartment next door. From there, Madoka's determined pursuit begins…!? (Source: Core Magazine, translated) Note: Includes one extra chapter.