Hello, Goodbye achievements

Play the game with popup messages turned off

Finish Natsume's route

Play the game for over 24 hours

Use the glossary

Listen to one full loop of theme song on the title screen

Unlock additional choices

Quick-save more than 10 times

Play the game with all glossary entries having been read

Listen until the end of Yukishiro George's second speech

Finish all routes

Use the quick jump feature 10 times