S1E2 — Boku to Sensei to Tomodachi no Mama — Episode 2

In the second episode, the protagonist visits his friend's house to retrieve a DVD but gets caught in sudden rain. His friend's mother welcomes him in and insists he take a warm bath to avoid catching a cold. What begins as a simple act of hospitality soon turns into an intimate encounter as the mature woman takes the lead, introducing him to pleasures he had never experienced before.