NGL, man... this is confusing. Convenience Store? You mean in the same location as the doctor's office? There's a guy to the right that talks about a beer, but there is no "to the left." So, I tried talking to him. Then went to talk to mom and she's having a cigarette. I went to that hallway towards the baseball guy's tent, but the hallway and the actual place with the tent had nothing that said "click me." So, I tried clicking everything. Went back and talked to Riki who just talks about "old Sunagawa." Then what back at the farmhouse? Talk to mom again? She's just still talking about smokes. At this point, it didn't seem like anything was actually happening or working or changing.Dont know if u still stuck there, but here is the key
Talk to guys at left above in convinient store, back to farm talk to mom, go to the way u go to hobos tent, interact with the mark, back to station entrance to talk to riki (one in middle), back to farm house, go to the way to hobos tent again. Go back and sleep. Repeat it once more next day (pay attention to the conversations)