Here is the full list of all 12 Sakura Knight achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Meet your host
Meet the humble cat witch
Meet Felicia Maribelle d'Argento
Cooling of the Elves way
Learn to relax
Meet Rune the wolfgirl
Find the thieve
Meet Felicias sadistic side
Get a fresh start with Tart
Accompany Rune
Accompany Tart
Accompany Felicia