Yui and I became close through our shared indoor hobbies, and we always assumed sex belonged to outgoing people. Then she admits that she wants to lose her virginity, and we impulsively decide to try it together. Seeing her naked for the first time reveals a healthy, voluptuous body and gorgeous full breasts completely hidden by her usual plain clothes. We thought sex would be no big deal, but it feels so good that our hips refuse to stop. Driven by raw pleasure, the two introverts devour each other and keep fucking until every last bit of desire is spent.