A Villain Saving Background Characters?!

A depressed young man suddenly had his 'imaginary friend' come back one night.



He and her promise to become a couple after they become 18, did she come back because of it?



But what's this? The amount of time they could meet each week was only an hour or so?! this... fate sure is cruel...



Luckily there's still a solution to that! Because of 'him' giving our main character a cheat.



the two would be able to stay with each other as long as he saves and seduce some onee-san and oriolus?



Why is it seducing them and what the heck is an oriolus?



Found out more by reading the book~



We have a kind caring beautiful female lead ghost here :)