Easy "Normal Bad End Unlocked!" achievement:
Always choose the "Rest" option when available instead of
other dialog options.
Easy "Scientist End Unlocked!" achievement:
Have a high rating at the end of the game. To check your progress,
pause game play and check the screen with the knowledge and energy
bars. Invest all days into studying; and sleeping when the energy
bar is low. Visit Kouiji and Youiji or use Gossip a few times per
month. The responses in the dialogs will not matter.