ストーリー14をクリアしても、ストーリー15が解放されません。何か条件があるのでしょうか？

As an idea, what about playing actual music files downloaded onto the computer system like mp3 and so on, and play it like this?

This is to know how to make the other endings. You can do everything in Easy mode. - After you finished the Firts story, you need to lose on porpuse the third music, after that, the second story will be available. - After you finish second storry, you need to lose on porpuse the second music, after that, the third story will be available. Be aware that are extra songs Besides the same musics from the first game....

曲の記録が残らない。sound point も入手できない。

曲の記録が残らない。sound point も入手できない。