It's the continuation of the story of Oki and his girlfriend Ritsuko. There's so many holes in Minare's deduction that I have mistaken it for a swiss cheese 😂 and oh boy, my prediction was accurate on my previous review. Kidding aside, I like that the events in this episode connects with the earlier episodes. The overall case hasn't been fully resolved but at the very least Oki looks much better in comparison with how he looked on the previous episode.