Since an incident in college, Nagi has been unable to tolerate the touch of any man without her body recoiling and breaking out in goosebumps. Despite her tomboyish appearance and this deep-seated aversion, she longs for a romantic relationship. Her life changes when she encounters Aran, a beautiful and androgynous male model whose touch, to her shock, provokes no fear or discomfort. Seeing an opportunity to overcome her phobia, Nagi proposes a deal: Aran will become her temporary, practice boyfriend for one month to help acclimate her to physical intimacy with men.

The story is set in a contemporary, fashion-forward world that revolves around the modeling and photography industry, where Aran is an in-demand talent known for his ability to model both masculine and feminine styles with his long hair and serenely sensual features. Nagi is a cool, competitive, and boyish young woman whose tough exterior belies her inexperience and deep-seated yearning for love. Aran is beautiful, pushy, and egoistical, but he sees a hidden beauty in Nagi that she herself does not recognize. Their transactional agreement quickly evolves as Nagi finds her body refusing to respond to any man but Aran, while his initially nonchalant attitude deepens into genuine possessiveness and affection.

Their arrangement deepens significantly when, in a dramatic turn of events, Aran decides to move into Nagi's apartment, forcing them into a domestic cohabitation that intensifies their emotional and physical bond. As their fake relationship becomes real, the narrative explores Nagi's past trauma while navigating the public nature of Aran's career. A central conflict arises when Nagi, distressed that their relationship is negatively impacting Aran's professional life, decides they should take a break. This leads to a troubling incident where, after drinking with a love rival named Shoma, she wakes up in his apartment with no memory of the previous night, creating a major rift and a romantic triangle.

The story continues to raise the stakes on both personal and professional fronts. Aran promises to help Nagi overcome her insecurities about her own pleasure, vowing to make her take back her claim that she is happy as long as he feels good. Simultaneously, Nagi is given a high-stakes mission by Aran's manager, Bazan, with the condition that if she fails, Aran's ambassador modeling contract will be canceled. The plot thus weaves together the couple's efforts to build a genuine, healthy physical relationship with external pressures from the fashion world, all while they confront the vulnerability and misunderstandings that threaten to pull them apart.