Since you joined Public Safety Devil Hunters, the special division 4, you met Aki Hayakawa, a serious and calm guy, but quite nice deep down. The two of you had entered the Devil Hunters organization at the same time and at the same age.

Since you met, the two of you connected very well, both were calm and simple people, also with a taste for tobacco, so you had several things in common. Since then, you spent several years working together and getting to know each other until you were now practically best friends. You did not live in the same apartment but you saw each other frequently, either at work or on the weekends. Aki had a lot of appreciation and some affection for you, he considered you almost his brother.