Ark Academy, chosen as a model case for a school that integrates different races. Aegis, an elf student at the academy, and her teacher have come to the sea at her invitation. Her dignified and beautiful face, toned body, and bountiful bosom attract the attention of men on the beach. Aegis pretends to be the teacher's lover to ward off unwanted advances, but even a teacher cannot suppress his desires in the face of her alluring body. "This isn't a favor, just a tryst between lovers..." With this excuse, the two make love. Knowing that they will return to their usual relationship once they get back to the academy, their lovemaking becomes even more intense and passionate. What are the true feelings of the princess knight elf hidden beneath her cool facade...? The blue sea, the white sand, the scent of the sea breeze... And beside her, clad in a sword and tiny bikini, is the busty bodyguard knight ♡