So this story was a one shot comedy. As a little kid this man ate the last tuna in the world. He grows up to be a scientist attempting to clone or otherwise recreate tuna. Instead he accidentally cures diseases helps someone else make a youth serum and stops global warming and pollution by making an entirely new species that somehow gains basically god like abilities. In the end, as thanks to their creator, this species grants him one wish and he wishes for tuna to return, which they do. I remember laughing really hard at this story. I also remember that it once was a collection of one shots from possibly different authors. Thanks in advance
Oh i know that one. :D Somehow i couldn't find it here, but you can read it on mangafox. ;D http://m.mangafox.me/manga/hotel/v01/c003/1.html
Guys relax. If I remember correctly from the spinoff these two are only broken up for a short time before talking it out and getting back together. Or at least they better or I'm gonna be pissed.