Here is the full list of all 17 Real Life Plus Ver. Kaname Komatsuzaki achievements.
Start the game
Complete elementary school arc
Complete junior high school arc
Complete high school arc
Get Ending 1
Get Ending 2
Get Ending 3
Get Ending 4
Get Ending 5
Get Ending 6
Get Ending 7
Get Ending 8
Get Ending 9
Get Ending 10
Get Ending 11
Get Ending 12
Get Ending 13