このわたくしが…こんな触手で絶頂なんて! ～触手びしょ濡れ高慢JK・杏珠～

Tokumei is a male teacher in a certain girl's school. His true identity, however, is a space alien who breeds and sells tentacles for various sexual uses. Mei, one of his students, is being used daily as test subject for new species of tentacles. One day, Anju accidentally witnessed their abnormal experement... And so, they turn her into the new test subject.