Hanako Games

Alright I have achieved Nazagi and Oscar best ending!!!!!! Now I have to work on Callum

I tried to be useful with Nazagi and I got the exact same ending:P and I cant get the best on Callum either!

How do i get the get the best ending on oscar and nazagi??

So I have been playing this game NONSTOP because I really love it but I cant get anything other than the normal or happy end with anyone. Is the next ending the bad or best one? I dont want to ask for a walkthrough but I am seriously stuck!!