Ichiro Asada

Ichiro Asada is a former math teacher that worked at the high school where the students that were summoned to Tortus attended.

Appearance
Ichiro is an adult man with sharp eyes and had his hair combed down.

Personality
At first, Ichiro presents himself as a strict teacher with high morals, while also having a sarcastic tone. However, he also has a perverted side, as he is attracted to his underage student Shea Haulia.

After learning of Ichiro teacher's attempts to flirt with Shea, Hajime and Yue alter his personality to make him act like a drill instructor.

Chronology
When the students that were summoned to another world returned to Earth and permitted to resume their classes in high school, Ichiro was assigned to be their math teacher.

One day after school, Hajime and Yue confronted Ichiro in his office after learning from Shea that he was making repeated advances towards her that she felt had a sexual undertone. Afterwards, Ichiro's personally drastically changed.

Ichiro eventually resigned from his job.

Relationships

 * Hajime Nagumo - Ichiro initially considers Hajime to be a delinquent. He openly expresses his animosity towards Hajime in class and would frequently lecture him on morality. Hajime does not mind his teacher's treatment towards him out of consideration of the fact that Ichiro is willing to teach him and his fellow returnees at all in spite of the negative publicity surrounding them. A part of Ichiro's ire towards Hajime also stems from his jealousy of him being in a relationship with Shea.
 * Shea Haulia - Ichiro frequently expresses an attraction towards Shea and has made repeated attempts to get her to spend time with him in his office.

Etymology

 * The name Ichiro means "one" (一) and "son" (郎). This was traditionally a name given to the firstborn son.
 * Ichiro's surname Asada means "shallow" (浅) and "rice field, rice paddy" (田).