Transferred from headquarters to a department comprised solely of female employees, I found myself seated next to Ms. Sasaki, whose thick, voluptuous thighs immediately caught my attention. Through her pantyhose, the outline of her panties became visible, quickly arousing me. Noticing my erection, she at first teased me playfully, but it soon became clear she was deeply excited by being the only woman around a fully erect cock. Deliberately staying late after work, she created opportunities to flash her panties and further stimulate my arousal. Under the desk, she boldly grabbed my hard cock. In return, I touched her thick thighs through the pantyhose, discovering her extreme sensitivity. While waiting for the other employees to leave, she slowly grinded her hips, pressing her ass against my erect cock through the thin fabric. Unable to resist any longer, I tore her pantyhose and thrust inside her.