I have no immunity to girls, so I get an erection at the slightest thing. My childhood friend, sister-in-law, mother-in-law, and tutor couldn't bear to see me like that, so they tried various ways to help me overcome my troubles and help me to control my erection. And in the end, they said something pretty unreasonable, "Even if you touch my penis, try your best not to get an erection!" Of course, I got an erection, so I said, "If you really want me to get immune to it, let me do it!" And then...