For Germany's ending
-you have to join the music club
-once you get to the scene where you go to your club, Germany will ask you why you joined the club, choose the option that says that you wanted to learn how play classic music on piano or whatever
-you'll then be given the option to ask whether "how old are you?" and "what song is playing?" choose "What song is playing?'' option, then you'll have to say that the song is beautiful option
-Go back and see him again and when North Korea leaves the room, Germany will ask you why you showed up and choose the "i wanted to train with you" option
-then you keep on going back to see him each time and practice with him again
-then when you go see him the last time you'll get to the part where he'll say he needs your help asking someone out and he asks for your help, say "yes" and then once you go to the cafe with him, then...BOOM BOOM, YOU WON!(unless you reject him ofc lol)
(IMPORTANT NOTE KEEP YOUR ENERGY STAT HIGH, so try to use the sleep in class option a lot)
you're welcome >333