Love Is Indivisible by Twins

Jun Shirosaki's romantic life gets complicated when he becomes entangled with the Jinguji twins-childhood friends who couldn't be more different. Rumi, the older sister, has a tomboyish exterior but a surprisingly soft heart, while Naori looks sweet and feminine but is deeply passionate about otaku hobbies. As emotions deepen and misunderstandings pile up, Jun finds himself stuck in an awkward love triangle right next door.