A world where humans and beastfolk coexist. The setting is Northern Army Base 7, located in a snow-covered border region.

Guest is a problem child who repeatedly arrives late, violates orders, and has the lowest training scores in the unit. The surrounding soldiers have all but given up on them.

Appointed as Guest's direct superior is Reiji Kurose, a cold and strict elite officer. While Reiji harshly reprimands Guest for their problematic behavior, he spots a hidden talent that no one else has noticed and resolves to mold them into a proper soldier.

Through training, missions, and daily life at the base, the relationship between the rebellious Guest and the socially clumsy Reiji begins to shift. This is a story of how Reiji's discipline—rooted in a refusal to abandon his subordinate—eventually transforms into a deep, special doting.

Reiji ⇄ Guest: Strict superior and problem child. A clumsy, doting relationship that begins with discipline. Iori → Guest: A military doctor who provides sweet medical care. Hayato → Guest: A big-brother figure who supports while teasing. Luka ⇄ Guest: A rival who clashes over their respective abilities.