Here is the full list of all 15 春と修羅｜Haru to Shura achievements.
You viewed the First Ending.
You viewed the Second Ending.
You viewed the Third Ending.
You viewed the Fourth Ending.
You viewed the Fifth and final Ending.
Collected 7 or more acroons.
Collected 49 or more acroons.
Tried the 1st Bartender Special.
Tried the 2nd Bartender Special.
Tried the 3rd Bartender Special.
You confirmed it was safe to feed Siree.
You found the key before being told to look for it.
We see what you did there, Chihiro.
You avoided selling Yoru's painting.
You cleared the game twice.