I mean, that's just increase the stats, if the sister panty stuff not connected with it, then it won't happen just by increasing the stats.
Not yet can occur if that part of the quest not event started or you don't have enough money to pay or something like that. It's hard to say exact thing without look at the save.
You should try to go further in the bathroom, or at lest try to. Then in the morning the MC will think about that if somrak can teach anything more. Usually.
I understand, but I do encounter a bug. Below is a post on how to possible avoid the bug, but the code did not work. That was the source of my question
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