[IPZZ-850] My childhood friend Momo, worried about my NEET life, proposed a TTM game (lose if you get hard) to bet on my social return. Her lewd body and extreme seduction instantly made me fully erect and cum hard.

TTM. . . now, that’s ingenious. With Momo, it’s an instant loss, though.

Did NOT understand the TTM on the cover – at first.

Looked at the cover. Saw

TTM

勃ったら負け

And on the back cover, saw that same thing separated on the letters

T勃っ

Tたら

M負け

A little googling explained

Tatsu 勃つ means a penis becoming hard

Terara てたら means if only…

Make 負け means loss

Suppose that’s TTM “lose if you get hard”

Then looked for a plot description. What I found was long, longer, longer still, and useless. But it ended with this

ポコタテ勃起勝負が始まった

Pokotate bokki shōbu ga hajimatta

Which Google Translate told me means:

The “Pokotate” erection showdown has begun.

ポコタテ being Pokotate. . . .

Now to try to understand that. . .