Have you completed Tocchan's route yet? Because when you finish his route you get a new cheat that unlocks both the secret characters. When you enable that cheat all you need to do is have a drink at the pub once, then start working there and keep on working until you get all of his scenes.
To save you some further frustration (because I had a lot of trouble with his route), here are a few tips for his route:
- When he asks you if you wanna have sex with him, save right before you agree so that you can get a new cg, then reload your save and refuse his offer.
- Take him to the hotel when the option comes up.
As long as you keep these tips in mind, after the hotel scene, all you will have to do is wait until you get a new job in December, call out to him when you see him again, then everything should be smooth sailing from there.
I hope this helps.