Here is the full list of all 29 Fashioning Little Miss Lonesome achievements.
Avoid commitment with all your might.
Announce your love to the world.
Make your ship canon.
Start the 3P route.
Stake your claim in front of everyone.
Gamedev is hard, kids.
Entrust Saito with your entire life.
Have Daddy pull some strings.
Hell is other women.
Send 'em running for the hills.
Get a little too comfortable with comfort food.
Down, boys!
HAHAHAHAHAHAHAHAHAHA!
Make a career out of your bitchface.
Join a cult, er, empire.
Wow. That was uneventful.
Get Miki's hopes up.
Make 'em walk a mile in your fishnets.
Don't get on his bad side! Oops, too late.
He's harmless... right?
Start the game.
Play Miki's bonus scenes.
Play Saito's bonus scenes.
¯\_(ツ)_/¯
Make a new... friend...
Force Saito to take desperate measures.
Choose Miki over modeling.
Bring Saito back from the brink.
Get every ending.