Four people with true love and sex, missed their true love due to the trick of fate.
In the final analysis, it is just the old saying "I stand in front of you, but you don't know that I love you"
Close at hand
It's also the end of the world
The story won't be too long, and the traps are definitely guaranteed, so please feel free to jump in boldly.
(Background music attached: Sister, go forward boldly, go forward, don't look back...)