In a bid to address the declining birth rates among demi-human races lacking male members, a unique government initiative mandates human participation in a designated 'assistance system.' Iris Thea Eaderlindt, a compassionate elven princess renowned for her amicable stance towards humans, finds herself at the Ark Metropolitan Academy. To her astonishment, her assigned mating partner happens to be her new teacher. Faced with a mix of apprehension and determination to safeguard her race's future, Iris embarks on intimate encounters with him. Unveiling a surprising twist, Iris learns of her partner's orc lineage, celebrated for their remarkable sexual prowess. As more demi-human students uncover the teacher's unconventional role, Iris grapples with the challenge of maintaining his focus amid growing competition for his attention.