During a meeting, he jokingly mentioned that he could get his dick hard again immediately even after ejaculating. Nana Mi Kawakami didn't show surprise or interest, but it sparked curiosity about whether it was actually possible. They begin testing—first verifying if the technique really works. Then, they proceed to challenge various scenarios: whether one with premature ejaculation can enjoy prolonged sex, whether someone with erectile dysfunction can maintain an erection, and even if it's possible to keep having sex endlessly.