Here is the full list of all 16 Hatoful Boyfriend achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Get Okosan full ending (ED no.07)
Get Sakuya ending (ED no.02)
Get Sakuya full ending (ED no.03)
Get BBL ending
Get Yuuya ending (ED no.05)
Get Ryouta ending (ED no.01)
Get Nageki ending (ED no.04)
Get Kazuaki ending (ED no.08)
Complete Torimi cafe story (ED no.12)
Get Bad ending (the hawks party killed you)
Get Okosan ending (ED no.06)
Get Shuu ending (ED no.09)
Get Shuu ending (ED no.10)
Get Anghel ending (ED no.11)
Get Azami ending (ED no.13)
Get the BBL epilogue (unlocked by getting all 14 endings)