The brat's aphrodisiac gun aroused the busty tutor, making her want to have sex. (Mao Kurata, HBAD-442)

The kids attacked their busty tutor with water guns, soaking her so much that she had to take off her bra to come to class. But the exposed breasts were too much for the kids, so they added aphrodisiacs to the water guns and sprayed her with them until she was aroused and had a wild, intense fucking session with them!