Here is the full list of all 8 Forgive My Sins & Desires, Father - there are BL achievements.
Samael Leaves the Altar With the Priest
Samael and the Priest Lives Happily Ever After
Samael Strangles the Priest
Samael Goes to Jail
Samael Is Left Heartbroken
Samael Becomes Obsessed With the Priest
Samael Gets Married
Samael Murders the Priest