Summary
Tetsuo Takahashi serves as the central protagonist of the series. Working as a biology teacher, he is deeply captivated by Demi and eager to gain a better understanding of their nature. His students often dub him "Iron Man," a playful nickname derived from his robust physique and his name. As he delves deeper into Demi's world, Takahashi begins to grasp the unique challenges they encounter as both adolescents and Demi, prompting him to offer his support whenever possible.
