No, the bug triggers everywhere. Maybe because i have started a save in the steam release and later patched the game. I don't know but it's unplayable now.
EDIT: Yes, it is. Fuck the creator. Maybe one day he will learn how to program as well i will how to speak in english. But for now, i have lost 1h of progress. Not much really, but how stupid way to waste my time! If you start the game and finish the first day with the MC as MC, the game will skip the first sex position, the misionero. Then, if you patch the game and change the MC as Boku, the skill will be missed, and you must spend 100 points (or 70?) and your save is broken.