On a day trip for work to a regional area with my junior colleague Aina, our return Shinkansen was canceled due to bad weather, forcing us to stay overnight. We couldn't secure two separate rooms, so Aina and I ended up sharing one. Aina had been drinking heavily and became much more outgoing than usual—revealing her true, uninhibited self. As her drunkenness intensified, she asked me, "Please show me you jerking off." I agreed, on the condition that she show me her breasts in return. Though Aina looked modest in clothes, she turned out to be a stunning G-cup. Emboldened, I made increasingly lewd requests, and Aina grew more and more aroused. Alone together in the same room, we indulged in intense, full-on sex.