surprised no one suggested achievements or some type of challenge reward like
Getting to day 5/10/20/35/50 each give lust (first time only)
Day 100 unlocks a new hair in fap mode
Having 15 full passive closets will reward a new grab of tentacle in fap mode
Catching the rainbow hair girl in a passive closet
Catching 3 different types of waifus in the same day unlocks waifu hair in fap mode
Alerting 5 girls with 1 abduction or leaving a closet at once gives some lust
And other stuff
Also like other people said milking the girls expanding their breast, anal penetration and one of my favorites birth and impregnation by catching a girl in a special locker for these actions
And if you get abducted by 2 different lockers a new seen ĺike fucking a girl with huge breast in a normal locker or the pregnant girl spreads tentacle a way to get to other maps or even aphrodisiac to get more lust per capture or overall in the passive closet
Also stuff ppl said like futa girls different maps and costumes