FYI the save function is bugged at times, if you try save before 16th say 13th its just going play out you didn't talk to anyone and try to stick it out, right now you have play through full 20 days, which isn't bad right now since its pretty quick, just when they add more stuff hope this does get fixed.
if you want all scenes with boyfriend and girl friend you need talk to her every day you can and she needs like your response to her questions if you answer them all right you can bang her up 4 times to unlock the outfit.
not sure how unlock rest of scenes for guy in store, old man that's it for now says more that route will be added later (old man you have tell girlfriend the truth or event won't trigger, it didn't for me when kept quiet). Not sure how to get abduction to work i just get early gameover most cases, her being naked need confirm if I decide not to talk to girlfriend at all whole run does she go in lust mode, hear she will fuck a zombie