Legit where does this story even go now
-Manaka, her sister and/or Sagawa finds out about the nudes on Chisaki's or Ueno's phones and take action.
-Ueno losing his virginity to someone is the next course of action.
EDIT:
Tsubomi continuing her intimacy training which might be awkward now if Chisaki contacts Ueno for more fap material.
- One big plot point is Manaka trying to come to terms about her feelings about Ueno and if she's willing to compete against Chisaki.
One final note is that according to the author on Twitter, the next chapter will give some hints on how the story will develop next and after gleaming through that chapter on yanmaga, I agree with the author.