I do get why he despairs. without our meta-goggles There's literally no guarantee that he'll EVER respawn at a point where rubia's alive. For all he knows he'll respawn before freed by isaac where rubia and rena will be perma-dead.
Like obvs he'll meet rubia again, but he can't know that.
huh, i guessed from the cover that it's going to be a light hearted push and pull between the 2 fans, kinda disappointed that one's just a yandere.
Oh well, in for a yuri in for a dere