theres a virgin end but its just an achievement, its also a bad end in a sense since lona dies alone a hag unloved and forgotten, you can get it trivially through rebirth, frankly virginity is only worth money ultimately, so theres no point in preserving it since it locks you out of rebirth, if you don't get pregnant and birth out a kid.
Rebirths are also a core concept of the game that are required to change lonas race,reset quests getting up to 6 more trait points (per rebirth) for a max of 98 levelup tp 5 rebirth TP and 1 boat rebirth TP and is also useful for updating save file to the current version of the game. You keep whatevers in your bank whatever hairstyle you are wearing and whatever dye is in your hair when you do a rebirth.