"Sakuran Boy DT" centers on the life of a high school student named Tetsuhiro Maeda, whose ordinary existence takes a bizarre turn when he discovers he has the ability to transform into a girl. This transformation occurs whenever he experiences strong emotions, particularly those tied to romantic or stressful situations. The series explores the challenges Tetsuhiro faces as he navigates his dual identity, balancing his male and female personas while trying to maintain a semblance of normalcy in his daily life.

The narrative delves into Tetsuhiro's relationships with his classmates, particularly his childhood friend, Yuki, who becomes increasingly suspicious of his erratic behavior. Yuki’s curiosity and concern add tension to their friendship, as Tetsuhiro struggles to keep his secret hidden. Meanwhile, Tetsuhiro’s female alter ego, who goes by the name "Tetsuko," begins to attract attention from other students, further complicating his situation. The series uses this premise to explore themes of identity, self-acceptance, and the fluidity of gender roles.

As the story progresses, Tetsuhiro encounters various comedic and dramatic situations, often stemming from misunderstandings or the unpredictable nature of his transformations. These scenarios highlight the contrast between his male and female experiences, offering insight into societal expectations and personal struggles. The series maintains a balance between humor and heartfelt moments, using Tetsuhiro’s predicament to address deeper questions about individuality and the pressures of conformity.

The supporting cast includes characters like the eccentric school nurse, who becomes an unlikely confidante, and Tetsuhiro’s rival, who harbors feelings for Tetsuko without realizing her true identity. These interactions drive the plot forward, creating a dynamic and engaging narrative. Through its exploration of Tetsuhiro’s dual life, "Sakuran Boy DT" presents a unique take on the challenges of adolescence, blending comedy and drama to create a story that is both entertaining and thought-provoking.