Just 2 cents.
At this point with the flashbacks. I think she doesn't had gathered all her memories back. Sure she says so, but the lead scene they doing it on the balcony so the older neighbor lady heared everything wasn't in the flashbacks. Also before the accident that caused the memory lose this lady said they made it but every day. But the flashbacks never had us taken to this episode. Therefore if it not ends right here, there is another round where Arisa still isn't confident to have the all in sex and they get another cockblockround until her final blockade brakes and she is ready to go the full distance.