This guy is so innocent and happy despite being a hitman. Typically these traits are assigned to naive, stupid characters, think Ichi the Killer, but Fable is also highly competent, which makes the whole story enjoyable.
She didn't even do AVs? She only did non-nude gravure? Holy crap, she's a trouble-magnet. Creeps and yakuza are all over her. I suppose all of them are going to be dispatched by the MC, though. Just because of plot.
To be honest, I liked than lion before president said so. Satou just genius. Usually I'm not like the MC for some reasons, but fir this one, with all his antiques, I really loved him.