Kota Aso, a young resident, confides in his professor his intention to quit. The professor, intrigued by Kota's bisexual leanings, invites him to his office for a 'private discussion.' There, Kota is astonished by the professor's monstrous cock, far larger than any he's seen or felt. The professor, sensing Kota's desire, offers a tantalizing distraction from quitting: a chance to explore their shared bisexuality. He strips, revealing his massive, throbbing dick, and Kota, drawn to it like a moth to a flame, tentatively touches it, feeling its heat and pulse. The professor guides Kota, showing him how to stroke and suck it, teaching him the art of pleasuring a man. Kota's apprehension melts away as he loses himself in the professor's cock, feeling it grow harder and bigger in his mouth.