The aftermath of the ferry incident signals a clear shift in Kazuya's feelings. Meanwhile, there's a conspiracy brewing at the hot springs inn he and his family decide to visit.

While Kazuya desperately tries to get Ruka to promise she won't reveal his secret, she tells him her own.

Having to spend a night in the same room with Chizuru sends Kazuya's heart and mind racing. Meanwhile, Kuribayashi Shun has a surprise in store...

Christmas rolls around with Kazuya not having met Chizuru for ages, and he sees something he never wanted to see.

Konomi has built up a resume for herself by entering competitions left and right. And in the latest one, she runs into Anne, who has an unexpected proposal.

Jun's back! As the Hanamiya team works together again, they identify one problem area: speed climbing.

Konomi asks Mimu for advice on how to climb faster. Will she break the 15 second wall as the Combined Cup draws ever closer?

The Combined Japan High School Cup approaches its climax with Kokureikan looking truly unsurmountable. Can Hanamiya prevail?

Magna, Luck, and Gio, the most powerful Underwater Temple mage, risk their lives fighting Vetto. Asta and Kahono’s older brother, Kiato, also arrive at the scene.

One of the members of the Third Eye, Vetto, appears at the Underwater Temple along with his underlings.

Kahono and Noelle reach Asta and the others. Noelle is astonished at how powerful Vetto is, but Kahono remains confident. She is the granddaughter of Gifso and cherishes everyone at the Underwater Temple, which she is willing to do anything to protect.

Asta’s sword finally manages to take down Vetto! But that was all a part of Vetto’s plan. He manages to steal Asta’s sword and break his arm. Vetto proudly proclaims victory, but Asta doesn’t give up hope.

Asta continues his attacks against Vetto with support from Vanessa and Finral. They finally manage to land a blow on Vetto, but it’s not very effective. Vanessa and Finral remember when they were younger and much weaker.

Asta and Noelle train for their upcoming mission and meet a girl named Kahono, whose dream is to become an idol who can sing, dance, and use magic.

Asta and the other Black Bulls are split up throughout the Underwater Temple due to Gifso’s magic. They are forced to go head-to-head with the temple mages in a battle royale.

The members of the Black Bulls all surpassed their limits and defeated a powerful enemy. They manage to safely get the magic stone and successfully complete their mission, and all the members other than Captain Yami go recuperate.