Here is the full list of all 44 Mr. Massagy achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Get a massagy with a duck
Get a massagy with Cake-chan
Get three stars with Cake-chan
Get 50 Massagys
Turn volume to the max!
Read all the credits
Get a massagy with S.O.N.I.A.
Get three stars with S.O.N.I.A
Take a 20 minutes Massagy
Take a 15 minutes Massagy
Take a 10 minutes Massagy
Take a 5 minutes Massagy
Take a 1 minute Massagy
Get three stars with Navia
Get three stars with Papu Aiye
Get three stars with Anne
Get three stars with Dorothy
Tap the Mayonnaise
Get three stars with Janein
Kill 100 ducks
Get 20 Massagys
Get a massagy with Navia
Get a massagy with Mayo
Get three stars with Mayo
Get a massagy with Sarah
Get three stars with Sarah
Get a massagy with Papu Aiye
Check your stats
Get a massagy with Anne
Get a massagy with Martha
Get 10 Massagys
Get a high intensity massagy
Get a massagy with Dorothy
Get a low intensity massagy
Get three stars with Rial
Get a massagy with Janein
Get a massagy with Nicole
Get three stars with Nicole
Get three stars with Martha
Get a massagy with Rial
Fail a date
Get two stars in a date
Match a date on Linger
Reject a date on Linger!