Naoya Mukai is having the time of his life after one of his numerous admissions is finally accepted by his childhood buddy Saki Saki. He goes out of his way to bestow affection on his now-beloved partner, ensuring the longevity of their relationship. However, after months of planning, another girl called Nagisa Minase unexpectedly confesses to Naoya one day. Despite his courteous rejection, Nagisa's alluring charisma and persistence continue to entice Naoya. To satisfy both Saki and Nagisa's needs, Naoya comes up with the wild notion of dating both of them at the same time, with both females fully knowing. This out-of-the-ordinary condition of affairs eventually leads to bizarre and humorous circumstances in whatever they do to keep their unconventional relationship continuing.