Doki Doki Pretty League Final

Pink Angels who won the JPL league discover their trophy disappearance one day. Hero does not want publicity and wants to hire a private detective. But on his way there he attends a birthday party of one of team members and discovers the cup in one of the rooms...

Mentioning anything else of the plot would be a spoiler. Enough to say that there is a happy end. This episode is "final" instead of a number meaning it's more of an extra episode after the whole baseball business. Episode is the longest and does not have a game included making it a nice final.