Yokai Watch Shadowside

Yokai Watch Shadowside is the sequel to Yokai Watch, and comprises of the 2017 movie Yokai Watch Shadowside: The Return of the Oni King, and a television series that aired from 2018 to 2019.

The movie takes place 30 years after the original Yokai Watch, when an epidemic Yokai virus known as Onimaro has started affecting people with malevolent intentions, turning them into Kaodeka Oni and causing chaos. Keita's daughter Natsume is chosen by a new Yokai Watch to stand up against the threat and save both Yokai and humans from certain destruction.

The television series takes place after the events of the movie, where Natsume's younger brother, Keisuke begins to notice that his sister is frequently comeing back home late. Decided to stalk her, he finds out that she is doing her duties exorcising evil Yokai alongside her friends Touma and Akinori, while running a Yo-Kai detective agency. With their secret revealed to him, Natsume decided to let him tag along in her activities as they investigate Yokai crimes and take on evil Yokai to maintain peace all over the city.

Yokai Watch Shadowside: The Return of the Oni King
Touma is revived.

Episode 16
Akinori and other beachgoers are seen in swimsuits.

Episode 18
The gang is at a swimming pool.

Episode 22
Touma appears naked.

Episode 31
Akinori strips to his underwear

Yokai Watch Shadowside: The Return of the Oni King (Manga)
Toma freshens up in the morning.