Rumi and Naori are twins but have nothing in common, except their feelings for Jun, their next-door neighbor.

After dumping Jun, Rumi makes another request of him, one that he couldn't have seen coming.

Jun and Naori go on a date to a familiar location, which gives Jun flashbacks to when he was there with Rumi.

The negotiations over the empty clubroom begin, while Rumi's situation with Mizumi grows more complicated by the second.