When Sherlock and his friends are in their sixth year, they meet the trio. A Valentine's Day ball is coming around the corner, and two members of the trio ask Sherlock and Molly to the ball. After the ball, they slowly fall in love. In this crossover their all 16 & 17, Harry Potter Characters are older. The couples are, Sherlock and Hermione, Molly and Harry; also Ron and Irene, and John and Ginny. Their ship names will be in the tags.