Day One

• Is this deja vu?
• Clean garden
• Keep looking
• Noble’s clothes?

Day Two

• The one in the Sal Forest
• With just this info...
• See Migiwa
• About Nami's clothes
• Run to Oni Stones

Day Three

• Wait and see
• About Natsu nee-san?
• Save Migiwa

Day Four

• If that’s the case
• Fight
• …
• Go back
• Attack first

Day Five

• Migiwa and Natsu-nee?
• Wait
• Ask someone
• Stay calm
• Watch

Until the very last decisions, the choices are the same as for the happy ending.
If you save right there, it's more efficient when gathering the endings.
You can also get here from the route towards the the bad ending where Syouko becomes the Kenki.