The story picks up with Elna Neumann, a young viscount's daughter from the countryside, experiencing a sudden influx of memories. She realizes she has been reincarnated into the world of the otome game "Rainbow Paradise." Her primary goal is to live a peaceful life, avoiding any involvement with the game's plot. Her hobby of embroidery serves as a stress reliever.
The game's world is the Herz Kingdom, ruled by King Zafir. Elna's family, the Neumanns, are minor nobles residing in the countryside, with her elder brothers, Leonhardt (acting head of the household) and Teodor, working in the capital. Teodor, however, is now using the name Teo Bergman and is apparently serving as a guard to Prince Granat Hertz, the second prince and a main love interest in "Rainbow Paradise." Other significant characters include Lily Kiel, the commoner heroine with rainbow-colored hair, and Adelina Mises, a duke's daughter who appears to be a rival.
Elna's first day at the academy, where attendance is mandatory for those with magical aptitude, is marked by the realization that she is indeed in the "Rainbow Paradise" world. She witnesses the heroine, Lily, accidentally fall into Prince Granat, drawing the ire of Adelina Mises. Elna, with her plain gray hair and aquamarine eyes, feels relieved by her ordinary appearance, believing it will keep her out of trouble. However, her hope is dashed when she finds herself in the same class as Lily and Adelina.
Elna discovers a potential escape route: if she can prove she lacks magical aptitude, she might be able to leave the academy and return to her peaceful life in the countryside. This hope is bolstered by the fact that magic requires both innate power and learned spells.
During the academy entrance ceremony, Elna encounters her second brother, Teodor, who is now using the alias Teo Bergman and has dyed his hair a striking red. He reveals he is serving as Prince Granat's guard, a fact that Leonhardt is aware of. Elna is instructed by her brother to maintain distance, as his new identity is crucial for his mission.
Elna's desire for a quiet life is further challenged when Lily, the heroine, approaches her to offer assistance in finding a shop for embroidery thread. Elna, despite her resolve to remain unnoticed, accepts, partly due to her need for quality thread and partly due to Lily's charm. During their outing, Lily reveals that Prince Granat is a highly desirable bachelor, and anyone who gets close to him or his guard, Teo, is viewed as a rival by other noblewomen. Lily warns Elna that her brief interaction with Prince Granat and Teo has already made her a target.
Later, Elna discusses Teodor's unusual situation with her elder brother, Leonhardt. Leonhardt explains that Teodor is using the alias Teo Bergman, the fourth son of a struggling baronet family, to conceal his true identity as part of a mission. The elaborate cover story, including his dyed hair, is designed to make him both noticeable and difficult to trace. Leonhardt advises Elna to remain uninvolved and to focus on her studies, though he hints that her magical aptitude might prevent her from failing.
The chapter arc sees Elna grappling with her reincarnation and the daunting reality of being in an otome game world. She attempts to strategize for a peaceful existence, but her interactions with Lily and the revelation of her brother's secret mission immediately complicate her plans. The introduction of Prince Granat and the political nuances surrounding the royal family, particularly the status of Prince Granat as the Queen's son, add further layers to the unfolding narrative. Elna's initial goal of being a mere observer is challenged by her growing involvement and the potential dangers that lie ahead.
