[Just kissing...] Friends kept kissing, and as saliva accumulated, it gradually became erotic... Before they knew it, they were naked and had their first ejaculation inside each other, escalating into passionate pornography! [Mana] DDH-372

This is a challenge for a male-female team! They heard that if they succeeded, they could win 100,000 yen, so they readily agreed. However, the challenge was to "collect 100 milliliters of saliva simply by kissing"... The two were completely bewildered by this crazy task. But the huge prize of 100,000 yen lured them in, and they began kissing through plastic wrap. Unsurprisingly, collecting saliva was difficult. So they decided to kiss directly to increase the amount of saliva... As the kisses became more passionate, they were gradually aroused and began to crave each other's bodies. Even as saliva continued to accumulate, their sexual desire grew stronger, and eventually they began to have sex. They were trapped in a closed room, and the only way to escape was to continue collecting saliva... What will happen next?