Episode 143 of Boruto picks off with Team 7 trying to investigate the mystery surrounding Kokuri and Tsukiyo. The entire episode is set inside Boruto and Mitsuki’s prison cell. One of the cellmates has stolen the key card, and Boruto set out on figuring out who the guilty culprit is.
Benga threatens to put the culprit and the rest of his cellmates in full solitary to extend their sentences at the jail. Arai starts by taking control of the investigation with accusations on Kamata, then Kedama. But eventually, he’s caught as the true culprit and is subsequently arrested and taken into solitary.
Benga then begins to question the relationship between Boruto and Kokuri, while Tsuikyo sees through Sarada’s cover story and questions Kokuri’s intentions.
For me, Episode 143 felt like a detective mystery set in a small room. It’s one of those who-did-it sort of deals where the characters try to figure out which one of them stole the key card. Boruto and Mitsuki take the lead as the detectives as they attempt to track down who did it. The culprit himself was fairly obvious (when is it ever not the guy pinning the blame on others?) and I wouldn’t exactly call this a masterpiece in noir.
This isn’t really a story-driven episode, rather another filler that Naruto is famous for. Most of the times, these episodes are unexciting and lack action which is what the series is known for. Whatever the case, we learn a little about Kokuri as he seems to be hiding a secret that his outward appearance would suggest.