Height: 187 cm

He comes from a small town. He struggled in his teens because of his sexuality (is gay), as a child he always felt affection for Masaki, best friend of his older brother Kunihiro Morinaga.

After graduating from high school, he moves to Nagoya to continue his studies and thus leaves the town. Applies to the University of Nagoya, the Department of Science and Agriculture. In the winter of his second year, falls in love at first sight with Souchi Tatsumi, a senpai, feared in college for his tyrannical personality. After several failed attempts, he manages to strike up a conversation with him, then becomes his assistant.

Tetsuhiro usually frequents a gay bar where his friend Hiroto-kun works.