Bikini System explained (sfw preview pic)

Working on the bikini system.

The outfits will be ranked from 1 to 3 stars. Depending on your lust level and the rank of the outfit, you'll be able to do : sexy poses, topless poses and lewd poses.

Rank 2 and 3 will allow sex with some characters. Some bikinis will have the RF tag !

The four outfits will be available for purchase at Calvin Shop.
There are other bikinis to find with story and events. In case you missed the v-golden bikini, you can buy it there too (and trigger the hot spring scene back in Masa)