Kamitachi ni Hirowareta Otoko - Vol. 8 Ch. 40 - The Day of Parting

[MangaDex]

 

[Arvadiel]

Feels like we're getting near a timeskip

 

[Moridin69]

MC man, 40 year-olds can get lonely too. Every age group has that issue.

 

[NicholasTurner]

Honestly I thought he would give her the Slime core of his first ever tamed slime, it's fairly important to him after all.
Granted the author may have forgotten about it themselves, wouldn't be the first time I've seen it happen.