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