As the school trip continues, Sensei is starting to have doubts about himself. After an all night orgy with his students, he's currently in turmoil about his orc lineage's insatiable lust and his duty as an upstanding teacher.
Ursula, noticing that his heart isn't initially in it, gives him an aphrodisiac that will open the flood gates to his own feelings and desire. As the night dies down, Iris enters his bedroom and for the first time, Sensei satisfies her with his full body and soul. But you know getting something from Ursula is going to have some fun side effects.