A couple is challenged to participate in a game called 'something'! Hearing that they could win 100,000 yen if they succeed, the two eagerly followed along. However, the challenge was to 'collect 100ml of saliva just by kissing.' The two are bewildered by the absurd task. But swayed by the amount of 100,000 yen, they start kissing through their clothes. As expected, saliva doesn't accumulate easily. So they decide to kiss directly to increase the amount of saliva… As they sloppily kiss, both gradually get turned on and start craving each other's bodies. Despite accumulating saliva, lust won out in the end, and soon SEX began. Trapped in a sealed room, the only way to escape is by accumulating more saliva... What will be the result!
