There are over 18+ endings within the game.

The main ending will come about by helping the town mayor, an elf named Rain, with her chores and the problems that are happening both within and outside of Cotton Hill. The ending you will get for aiding her will deal with what Lance chooses to become after spending so much time away from the paladin order, and specifically his level of corruption. 

As for the main love interests, each of them will have one basic ending, and one ending if you are more thoroughly corrupted by  sin and decadence. Be ware that to get to these endings you will have to fight a number of creatures and bosses, many of whom will take issue with your presence, and some who will necessitate going through a dungeon or two in order to find and best.

There are also a few secret endings within the game which can only be found by becoming completely corrupt. 

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The Nightmare - Play the main story (Helping Rain) as normal and be completely corrupted during the beginning of the second phase. (MISSABLE!!)

Kingsmane - Play the main story  (Helping Rain) but be completely pure.

Pike - Play the main story (Helping Rain) as normal but be less than pure or be completely corrupted.

Krasz - Finish his questline as either a submissive or dominant individual.

Russ - Help him throughout his questline and be either less than pure or be completely corrupted.

Sen - Help him plow his fields or help him at night inside of his home with his questline.

Nibbles - Help expand his bar both upstairs and down at night, and then see through his questline.

Victory - Help him through his questline as either a less than pure paladin or completely corrupted.

Hammer - Help him through his questline by either passing on, or remaining as Death's protegee while being less than pure or completely corrupted.

Felix - Help him throughout his questline and be either less than pure or be completely corrupted.

Whyte -  Help him throughout his questline and be either less than pure (Not Missable) or be completely corrupted during the beginning of the second phase. (MISSABLE!!)

Cinnabun -  Help him throughout his questline and be either less than pure or be completely corrupted.