anyone can tell me how can I get this
Cabin Fever 's answer is basically on point. To get to the point where Wilfred talks about the rescue mission, you've got to complete all the previous required events that are listed in the Journal section (just click on the big letter "J" on the menu and select Event Log. Rescue mission is "What is Truly weak is Truly strong", so if you can't activate it yet look at the requirements (REQs) it has under the mission title.
All those things have to be completed first before you can activate the rescue mission.
Also, regarding the Soldato promotion event, make sure to speak to Wilfred after you meet with Blackie. He will tell you to collect the Promotion package (which you'll go to collect with Luna). From it you'll obtain a Soldato gun, which Wilfred says you need to start the rescue mission (otherwise even when you reach the rescue mission point and talk to Wilfred, he'll keep on saying "Come back when you have a gun"
On another topic, Onorina bitchy attitude was hot!! I want to teach that pretentious bitch a lesson in the lewdest way possible.
hahaha about starting to mix danger with sex, just know that that is a one way ticket... adrenaline works as a drug!
The important thing is that I am doing my job as villain of corrupting the souls of (not really) innocent (but actually already perv) humans.
Her feisty/bitchy attitude was hot no doubt about it.
And I think her having the whole pigtails hairstyle (first in DeLuca? Don't remember other characters with the hairstyles like that) just adds to her sexyness.
Yup, definitely want her as one of the side-girls now
Ha ha ha, somehow, corrupting the corrupt, seems to lessen that, as an act of villainy...
It's more like recruiting, at this point!
Hold on, are you building a villainous army?
Speaking of recruiting, in MC's stats screen there is a number section called "recruits." I'm wondering how this will come into effect in the future.