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 BBL ending
Get the BBL epilogue (unlocked by getting all 14 endings)
Get Anghel ending (ED no.11)
Get Yuuya ending (ED no.05)
Get Bad ending (the hawks party killed you)
Get Okosan full ending (ED no.07)
Get Shuu ending (ED no.09)
Get Sakuya full ending (ED no.03)
Get Nageki ending (ED no.04)
Get Sakuya ending (ED no.02)
Get Azami ending (ED no.13)
Get Ryouta ending (ED no.01)
Get Shuu ending (ED no.10)
Get Okosan ending (ED no.06)
Get Kazuaki ending (ED no.08)
Complete Torimi cafe story (ED no.12)