As said, it's a huge logic leap for a person. We can easily understand that since we've "met" Adam, the MC, Gina and Maddison for like a few hours. But they knew each other for years and hanged out together.
I wouldn't say that Adam was best friends with them, despite what they call each other. The MC said he was mostly there for Gina. The one that supported the MC from his youth was Gina alone from what I gathered, not the other two that he met later.
So... I would say MC and Gina were best friends (to obsessively good friends actually) and the other two rounded up the troupe.
But would you suspect someone that you hunged out with for say 5 years to spike your drink with aphrodisiacs and frame you for rape?!
If yes, you seriously need to hung out with a better group, friend.
All the hints point to Adam, he got his drink spiked the day Gina wanted to confess her love and she told Maddison so the only ones that knew was Adam Gina and Maddison, so if you look at the way it all happened the MC wakes up gets a call, then Maddison shows up before Gina makes him a drink then he loses control and wants sex, Maddison keeps saying i'm sorry for this so that would tell the MC once he recovers that Maddison did it since she said sorry 3 times. So all this means is the MC would tell Gina i got spiked the day Maddiosn come over before you only one person was over that day Madisson so she spiked me and she even admitted she did because she keep saying sorry only someone who did something says sorry so Gina it was Maddison now i wonder why and then Gina would say Adam has connections and hew know i loved you and he loves me and i was coming over that day to say i love you and told Maddison i beat so called Adam to tell him that he he gave her the pill.
You all can't see how simple it is maybe you should go ask a detective about this type of crime and who is the one they would arrest? They would all point at the MC is lying or he was spiked and only one person was around the day of the so called rape and the judge would say Maddison was the only one around she is guilty guilty guilty case closed but wait your honor not yet who gave her the pills right the judge says who gave you the pills how about a plea deal tell us who did and the jail sentence is gonna be shorten and she would say Adam after that case closed.
Very simple to figure out the freaking MC woke up and saw only one person that day and it was Maddison so she was the only one who could drug him and Gina knows that if she believes the MC like she says she does she would know only one person was around to drug him so that means Gina is a liar or a dumb bitch an so i say again i would kick her the fuck out and tell her i don't want sloppy seconds from a girl who fuck the guy that drug me and called me a rapist get the fuck out before i smash your head bitch if you loved me you waited too long telling me and ruined my life skank it was easy to tell who drugged me and you ran into his arms.
PS BTW in the flash back the MC does in fact know that Maddison did it she was the only one around to do it and she admitted by saying sorry 3 times.
So the MC is a weak ass dude gonna fuck miss sloppy rapist seconds that is her name since she fucked the dude that ruined your life an everytime you fuck her you are gonna see Adam laughing how he fucked Gina first and ruined your life.
This MC is so weak in the head i mean the dude could have moved on and got in shape and a real GF it has been a freaking year and he did nothing in that time.
If this ever happened to me i would either have killed Maddison after she told me who gave her the pills or i would have left that country went to let's say Japan and got in shape and started life over and if somehow Gina found me i would kick her out saying you wasted time and money coming to me no way i want you after you just said you dated Adam bye bitch.
I just hope we can date other girls and not have Gina be cool to just ignore her.