[John K. Pe-ta] Eigyou Monzetsu 24-ji! (COMIC Magnum Vol. 95)

Rookie salesman Tatsuno-kun gets stuck on a business trip with Komatsubara-san, his impossibly busty senior from the sales department, until a one-way mirror in their hotel bathroom accidentally puts her entire showering body on display for him. The mature office lady scolds him about acting like a full-fledged member of society, but her pent-up lust wins out and the two spend the whole night in bed, her mouth insisting on professionalism while her womb refuses to let his cock go. Morning brings a blown appointment, a furious client, and an apology with her body literally on the line that somehow seals a brand-new trade deal.