An Anime-original OVA with 2 episodes. 
 
1: Reminiscence of Lilies 
The paintings of white lilies painted by a popular noble painter get damaged at Bath, a famous hot spring in England. Feeling that he's seen the painting before, William goes to Bath, where he is reunited with Sherlock, who happened to be there to investigate the case. 
 
2: Moriaty Family's Day Off 
The Moriarty family is faced with the biggest crisis in its history: They have to host a tea party! Will they successfully complete the mission of entertaining the ladies while protecting the family secrets? 
 
Note: The episodes were pre-screened at a special event on March 5, 2022

Moriarty the Patriot OVA