If you completed Red Maiden and Revenge at Red Maiden you might be out of luck on Romance your on Blackmail Path. Just reload save if you have be nice don't do anything mean till you see on talk says let her go home early, watch her do yoga, give her microphone, give her cellphone, I gave one in Red Maiden and one in diner and she comments on it saying she already has a phone why do she needs 2 if you haven't given her phone yet she won't make comment get her favorite at diner she will visit you while sleeping 2 or 3x before the destruction of the cherry

in Red Maiden dont make her feed you nothing that's degrading to her, convince her to forgive her family after you've achieved happy time then you can do Revenge or game will auto kick you out of love and put you on Blackmail.