This manga is 100% girls. you don't see a single guy even as a side character. and this manga is mostly just MC having sex with other girls for money. almost a hentai, but still wholesome. okay, its a little fucked up because you are exploiting a poor girl, but this is fiction/fantasy and the manga doesn't take it too seriously with all the gags and chibi face reactions.
Plot
MC is poor and in college second year. Nakano (MC's friend who has lots of casual sex) convinces her with 30k yen to have sex. This friend starts a online group/club and people join that club if they are interested in paying for sex with our MC. Slowly, each character is introduced, and we soon jump to them having sex. There is growth in characters over time and their interactions evolve, but the main focus is still paying and banging our MC. There are 15 girls in total, and we have 6 girls established into the plot by chapter 23.
The real appeal of an erotica manga is the Sex scenes. The art is really hot. There could be a little more excitement if we had some roleplay or other fetisth stuff like Sub/Dom, but there's still plenty of variety like risky locations (library), weird members in club (self centered idol) etc..