A male teacher who can only fall in love with men develops a drug that causes penises to grow when taken! When curious Arisu drinks the potion, her pecker starts sprouting out! She finds pleasure in comparing her new cock to her pussy during her first gay experience with another man. Now she's completely hooked on dicks over vaginas!

男の娘♂しか好きになれない男性教師が開発した薬を飲ませると、おちんちんが生えてきた！？おちんちんに興味津々の【ありす】はオナニーを始めてしまう。男同士しか出来ない兜合わせ初体験で、おちんちんっておマンコより気持ちいい！とおちんちんの虜になってしまった。