Goddammit! This is a dark fucking period!—Dewey Cox
In the wake of Taichi’s sudden departure, the Mizusawa Karuta Club is still able to recruit four new members—two girls including one who is Class A, and two boys—and rather than quit like everyone expected, Sumire takes the lead on showing the newbies the ropes.
She has to, because Chihaya is too out of it. The cards “turn black” for her as well. Fukasaku advises that she “learn something”—anything—because karuta and the hundred poets can’t be all that holds her together.
As Mizusawa’s club loses its founding members, Arata remains determined to start one at Fujioka East. For that, he needs at least two new members, so he goes class to class in his black yukata, starting with the first-years and working his way up.
When he tells Yuu how he saw her as part of his team when they were caring for his grandpa before he passed, she decides to volunteer to join if he’s a member short—but he gains one more than he needs.
Wanting them to see one of the best at what they’re setting out to do, Arata arranges practice matches at the prestigious Fujisaki High, but Sakurazawa is the one to break to him the news that as he’s starting a new club, Chihaya and Taichi have quit theirs. He’s so shocked he can’t focus properly, but he’s still the only one on his team to come away with wins.
More importantly, he learns a lot about how a karuta team must be run and who must run it. It’s rare that a great karuta player is also a great leader. Fujisaki’s best player is Rion, but Hyuuga (“Cheers”) is better at rallying the team. Mizusawa’s leader was Taichi while its best player was Chihaya. Seeing them create a team inspired him to do the same. But he just can’t fathom what happened to cause both of them to quit.
However, he knows instinctively that as a member of their triangle it’s his turn to try to cheer them up, as they once did. So as his team is heading home, he takes a selfie of them bathed in the light of the setting sun. He assures Chihaya that Taichi “will be back”, and that the two of them have to get stronger to prepare for his return.
I don’t share Arata’s optimism, as Chihaya’s response to Taichi’s confession seemed like the final nail in the dual coffins of friendship and karuta. This season ends with us not even 100% sure Chihaya definitely quit, we only hear it second hand, while Arata has no idea what happened between Chihaya and Taichi. That’s a lot of balls in the air for a fourth season. Hopefully it won’t take six years to come!