I haven't played this Koikatsu Sunshine or the original Koikatsu yet, but I was curious is this and the original one an actual game or is it just a character creator and then ask for sex to get sex like Honey Select 2?
Cause I was kind of disappointed by HS2 where there wasn't anything to do other pick a background, choose a girl, and then run the same set of animations over and over. Like is there anything to do other than have sex? Like any RPG elements game mechanics? Get a job, run for class president or anything, etc...?
KK and KKS are basically "school harem" simulator (withtout harem scene....).
You don't have instant acess to H scene (unless you use mod to max affinity & learn all position).
You have to go and talk to the girl, gave answer that please them to get them to like you and love you enough to screw them.
In KK, it's a quetsion of knowing the girl preference and talking to her everytime you can. H position are learn by finding eros action in the map, getting friendly with as much girl as possible, doing a bit of H and finishing the pseudo story for 4 unique girls.
In KKS, you have to intereact a lot with the girls, gather talking topic to get point and affinity with them (basic talking won't get you past friend unless you really take lot of time). Plus, lot of H position and ecchi talking are get through point you earn by getting closer to the girl. It's more date-sim than KK, and much longer to get to do ecchi stuff with girl.
You can bypass it with instant all lover using mod.
But it's basically, comb the map each time for free subject / event & talk to everyone untill the relationship get up. Then screw as you want.....