栗原 絵里

She is a track and field athlete who belongs to the company's businessmen's team. She is serious and has a strong personality.

She is in a platonic love relationship with her passionate coach, and the two of them are training for the world championships.
She has big breasts, which is a handicap for a track and field athlete.

They are also unusually sensitive and produce breast milk even though she is not pregnant. She is troubled by the fact that even the mere rubbing against her clothes when she runs causes her to feel a sensation.

The protagonist begins to train her by torturing her breasts in a molestation session, and she gradually forgets her original purpose and becomes absorbed in the pleasure.