It's my fav for multiple reasons. Loli + incest (intended, not some 3rd party crap), prob the best renders Daz is capable of, good animations (at least within the limitations of Daz, VAM does animations better if you don't mind them looking more "cartoony"), interesting story (soap-opera-esque with a bit of mystery and Quinton-Tarantino-style flashbacks and not just "here's your family, now get to seducing them and look forward to just fuck scenes of the month after I get bored with the minimal plot" like a lot of incest AVNs (Grandma's House first that comes to mind). Also given the rarity of loli + incest these days that alone will make it popular (less competition, aside from the previously mentioned points). Aside from that loli (the og definition: prepubescent girls) and incest are just popular kinks. If those don't turn you on then you might as well give up trying to understand it. I know better than to even try to understand why people are into NTR, even when if one buys the argument that NTR AVN is not necessarily the same as a cuckold AVN (like most watching some black dude fuck my gf is the opposite of a turn on for me, same for simply getting cheated on).