"Ore no Kanojo ga Otoko na Wake ga Nai!" centers on the life of Ryuuichi Himeji, a high school student who harbors a secret: he is a cross-dresser. Ryuuichi’s feminine appearance allows him to pass as a girl, and he uses this to his advantage by working part-time as a model under the alias "Hime-chan." His life takes a dramatic turn when his childhood friend, Yuusuke Touno, transfers to his school. Yuusuke, unaware of Ryuuichi’s secret, develops feelings for Hime-chan, believing her to be a separate person. This misunderstanding creates a complex web of romantic tension and comedic situations as Ryuuichi struggles to maintain his dual identity.

The narrative explores themes of identity, self-expression, and the challenges of navigating relationships while concealing a significant part of oneself. Ryuuichi’s interactions with Yuusuke and other classmates, such as the perceptive and supportive Aoi Sakuraba, add depth to the story. Aoi becomes one of the few people who discovers Ryuuichi’s secret and helps him navigate the complications that arise. The series balances humor with moments of emotional vulnerability, particularly as Ryuuichi grapples with the fear of rejection and the desire to be accepted for who he truly is.

As the story progresses, Ryuuichi’s relationships evolve, and the tension surrounding his secret intensifies. Yuusuke’s growing affection for Hime-chan complicates matters, as Ryuuichi must decide whether to reveal the truth and risk losing their friendship or continue living a double life. The manga delves into the complexities of love and friendship, highlighting the importance of honesty and self-acceptance. Through its blend of comedy, romance, and drama, the series offers a nuanced exploration of gender identity and the challenges of being true to oneself in a society that often demands conformity.