The party inn more or less serves this purpose once you get the affection to the required level with each girl you can view the scenes as many times as you want.
If you don't want to bother with the affection mechanics, you can use the cheat room to give yourself as many aphrodisiacs as you need to max them all out.
You're probably getting extremely unlucky with the RNG. If you equip the friendship bracelet accessory it significantly increases the chance. (It can be bought at the Inn)
This is the plan moving forwards, the end goal is to combine them all into a big epic game in the end.
It is a shame it had to come to this but paying real artists fairly isn't cheap.