[Hochidonmai (Donburako)] I'm the trainee instructor's orgasm lecture!!

A nervous apprentice instructor leads a group of eager young male students through a series of provocative lessons, using a vibrating device and lubricant to demonstrate sexual techniques. The tension rises as the rookie is instructed to straddle and then take his own erect penis into the instructor's rear, creating a charged, explicit encounter. The stark black‑and‑white panels capture the raw energy and discomfort of the training session.