During work hours, a senior female colleague with large breasts attempts to boost the confidence of her virgin junior by practicing sex through 'so-ko' (frottage). Despite her inner turmoil and embarrassment, she teaches him everything from kissing to so-ko. The result is her junior's penis is on the verge of exploding, fully erect! As they rub against each other during so-ko, the senior female colleague can't help but let out a breath. If this deflowering sex act is found out, it will result in disciplinary dismissal. Completely monitor everything!
