Yami no Aegis

Yami no Aegis, written by Kyoichi Nanatsuki with art by Boichi, was serialized in the seinen manga magazine Weekly Young Sunday starting in 2003. The series was created to bridge the gap between hardboiled noir storytelling and high-stakes action, centering on Takeru Amasawa, a highly skilled private bodyguard known as an Aegis. The narrative is heavily influenced by international thriller cinema and professional security tactics, reflecting a desire to ground exaggerated martial arts tropes in a more clinical, tactical framework.

The visual direction, provided by Boichi, is noted for its anatomical detail, dynamic action sequences, and the juxtaposition of grit with stylized character designs. Upon its release, the series was well-received by audiences who favored darker, character-driven seinen titles. It is often cited as a formative work in Boichi's career, showcasing the technical precision and dramatic framing that would later define his international success in works like Sun-Ken Rock and Dr. Stone.