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