Seishirou Tsugumi

Seishirou Tsugumi is a skilled hitman disguised as a high school student. They are cool, composed, and highly efficient in their work, often displaying a serious demeanor that belies their true profession. Despite their tough exterior, they show moments of vulnerability and confusion, especially when navigating social interactions and personal feelings that are unfamiliar to them.

Initially, Seishirou Tsugumi is introduced as a transfer student, enrolling in the same school as the main characters under the guise of completing a mission. They are meticulous and dedicated, taking their role very seriously, but their presence quickly becomes a source of intrigue and speculation among their peers. Seishirou Tsugumi's expertise in combat and weaponry is unmatched, making them a formidable presence, yet they struggle with the complexities of teenage life and the unexpected emotions that arise from forming genuine connections.

As time progresses, Seishirou Tsugumi begins to question the nature of their assignments and the life they have been leading, showing a depth of introspection and a capacity for change. They are caught between the world they know and the new experiences they encounter, leading to a journey of self-discovery and the search for their true identity beyond the confines of their profession.