Keep playing until you reach this (No matter what decisions you have taken before):
SAVE NOW.Choose
Go to Takeo...
(You can save again if you want)
...then
Go to Keisuke to unlock:
Reload and choose
Go to Takeo to unlock:
Now can reload your save game and choose the other choices to unlock:
See if Yuri is arround:
Get a coffee:
Go to Keisuke:
Stay with the girls: