Virginity is not required to gain any character's heart
By the way, Logan's 2nd heart has something to do with "I owe you a bear". If your 2nd heart with Logan is "Forest scouting", you're doing it in the wrong order.
But there was a scene after we beat the alpha where logan has a scene with the pc, logan says that the pc was saving himself for logan
Edit: wait, is that why in the relationship log in logan that mentions that logan took pc's virginity that, i somehow cheated?
Edit: oh, wait, the virginity isn't mandatory, there's just extra text if the pc's virgin, though you cant have a relationship with gunnar if you want to be virgin so...