Tenma and Yoshio they have an entire manga on them its called "Mayonaka Drastic" plus a prequel called Yoru mo Hi mo Akenai
From what I can tell from the raws this whole manga takes place right before they get together officially. The next chapter goes back to probably... right after high school possibly college.
I think that ch 1 is current timeline so they are together... but Tenma is hiding feelings about something. They have a very strange relationship, so for all I know I'm far off.
why do i feel like his wife will die .. I really don't like this troupe where once mc starts becoming stronger & famous they always kills the wife & bring new beautiful younger girls as FL ....What crime did the wife do she has been dutiful & has been by his side when he had nothing but these authors always kills them aka discards them like use & throw tissue paper ..Its like they try to set this narrative that since mc is now strong & famous he need younger & pretty obviously virgin girl as a match ..
I was about to be happy cuz mc has already a wife and children but if mc's wife died and mc going to marry or bring another womrn then I'm out....
Sadly that's what it looks like & if the wife dies I will be 100% sure the plot will follow the same as I guess