At the end of the world, I still want to be with you (Yaoi)

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.

“Even if the world ended and you were the only woman left, I’d rather date this waiter!”
Just as Nuowan said these words, the apocalypse hit!? When he wakes up, there’s a male waiter by his side… Senyu. And although Senyu’s survival skills are invaluable, he keeps kissing Nuowan out of nowhere! Is he a post-apocalyptic hero, or a kissing demon? Can the pampered young heir and the OP waiter peacefully live out their days at the end of the world?