I think it took me 3½ hours to play through everything. Not sure, logs can lie, and I spent a fair bit of time running around trying to intentionally loose to all the different enemies, just to see who had defeat-scenes done and how.
Was surprised to see so many 'cute' scenes. Was expecting only/mainly porn. Definitely approve of that.
(Example, the 'calm' enemy in the ice area, or the naga, out of the top of my head.)