Nene Arisugawa and Rintarou Kamioka have a common passion for gastronomy and culinary arts. After a tough day at work, Nene confides in her neighbor Rintarou, and he soon discovers that she hardly consumes anything except protein shakes, cup ramen, and sports drinks. Rintarou becomes concerned about her health and offers to cook all her meals for her.
As they progress with their cooking arrangement, their relationship evolves, albeit with Rintarou remaining apprehensive around Nene. To add to the intrigue, Rintarou insists that Nene does not open a particular door in his apartment. Nene becomes curious about the possible secrets Rintarou may be hiding.
