Saku and Nayu, are cursed such that they must kiss each other once a day or they will die. Saku is the older brother of one of Nayu’s friends, and she doesn’t know him well at all. He’s a player. Nayu doesn’t believe in the curse at first, but soon her body starts feeling painful, like it’s being crushed. She needs to get Saku, to kiss her. When he eventually does, the pain goes away. The next day, he comes crawling to her with the same heavy/painful feeling. She kisses him, and it goes away. They end up passing the awful pain back and forth like that, having to kiss once a day to hold off death while Nayu’s sister (who is the one who cursed them by mistake) works to break the curse. Silly premise, but fun anyway ^^ (Kiss Shinakya Shinjau?! by Hibiki Ai)