Makoto Onidara holds the position of student chairman at Onodera Academy, a role secured through his family's deep connection to the institution. His grandfather, the former principal, posthumously dictated an unusual succession clause in his will: the right to become the new principal belongs to whoever can seduce Makoto using exceptional sexual techniques. This condition poses a direct threat to Makoto's chastity and forms the core conflict surrounding his position.

Physically, Makoto possesses a notably cute appearance, masking his exceptionally strong inner resolve. He shares a deeply affectionate bond with Kintarou Masaka, whom he calls "Kin-chan." Kintarou acts as both Makoto's devoted bodyguard and romantic partner, providing vital protection against those attempting to fulfill the will's stipulations. This relationship is Makoto's primary defense, allowing him to preserve his chastity and maintain relative stability at the academy.

The threat intensifies when rivals from the Onodera Academy Kawakara Branch School target Makoto. These adversaries employ tactics including public humiliation directed at Makoto and seduction attempts aimed at Kintarou, among other traps designed to undermine Makoto's authority and relationship. While their precise motives remain undisclosed, these attacks represent significant challenges to Makoto's safety and control within the academy.

Makoto's background is irrevocably tied to the academy's leadership legacy, placing him at the heart of the conflict ignited by his grandfather's will. His personal struggle involves navigating these external pressures while fiercely protecting his crucial relationship with Kintarou, his main shield against those seeking to exploit the will's terms for power.