Kitasan Black furiously trains for her last Arima Kinen. Team Spica together works to fulfill her final request for the race. Anticipation builds across Japan as fans realize this will be their last chance to see Kitasan Black run in the Twinkle Series.

Kitasan Black holds a press conference to announce that she will retire after this year's Japan Cup and Arima Kinen, shocking both her fans and friends who didn't know about her decline in conditioning.

The Arima Kinen is the final G1 race of the year, featuring a roster of horse girls selected by fan ballot. Tokai Teio is among the competitors, and this time, she is running with something to prove.

Kitasan Black resumes training, but she's still troubled by how she felt at the end of the Takarazuka Kinen. She throws herself into practice, but Trainer has started to suspect something about her might have changed.

Her focus renewed, Kitasan Black's performance in races is improving. She asks Satono Diamond to go on a trip with her. After playing rock-paper-scissors to select their destination, the two go on a long train trip together.

Everyone seems to think Satono Diamond can't win the Kikkashou because of the jinx on Satono horse girls. She decides to face the jinx head-on and prove there's nothing stopping Satono horse girls from winning Triple Crown races.

With the Arima Kinen over, Kitasan Black tries to come to terms with the outcome. She tries talking through her feelings with other horse girls, and learns about the dreams that Satono Diamond and Duramente are pursuing.

Special Week starts training even harder to prepare for the Japanese Derby. Her rivals, El Condor Pasa and Seiun Sky, are training hard, as well. Suzuka also tries to help Special Week get even stronger.

Tracen Academy and the nearby town are holding a festival together, and the school has asked Kitasan Black to head up the committee.The festival is a great success, prompting her to think about running the Prix de l'Arc de Triomphe.

Kitasan Black is on a winning streak heading into this year's Arima Kinen. Satono Diamond, having "broken" the jinx on Satono horse girls, is determined to win the Arima Kinen next and so prove that she is stronger than Kitasan.

No longer able to run at full speed, Tokai Teio realizes that she'll never win again. Left with no reason to race, she plans to withdraw from Team Spica, but Trainer asks her to put on one last show for her fans.

Team Spica is training to take down Rigil. Special Week realizes she really wants to race with Silence Suzuka, and decides to talk to the Trainer about it...

Kitasan Black is down in the dumps over her poor showing in the Japanese Derby, especially when compared to the star horse girl Duramente. Her dream of being like her idol Tokai Teio seems farther away than ever.

The time has come for the public to vote for the horse girls that will participate in the Arima Kinen, and Kitasan Black stands a good chance of making the cut. Everyone talks about their plans for the future while celebrating Satono Diamond's debut.

Silence Suzuka and Special Week start working hard with Team Spica in order to keep their promises to one another. Rigil is still doing very well in their races, while Grass Wonder looks forward to her race with Special Week.

Kitasan Black hopes to duplicate Tokai Teio's feat of winning the Japanese Derby after coming in third at the Satsukishou. But the Japanese Derby's course layout doesn't support her strengths as a racer...

All eyes are on Tokai Teio as she takes on the Japanese Derby, ready to gallop in Symboli Rudolf's footsteps and become an undefeated Triple Crown Horse Girl. The stands are full. The track is set. It's time to see which horse girl fortune favors!

Team Spica goes for their first shrine visit of the year. After praying for victory, Tokai Teio resolves herself to face rival Mejiro McQueen in the upcoming Spring Tennoushou. But before then, Mejiro McQueen must first make it through the Hanshin Daishouten preliminary.

Kitasan Black is stuck in a losing streak. While talking to Nice Nature, she gets the idea to attempt a more intensive training regimen, since she's not prone to injury. Trainer isn't convinced that's such a good idea...

In preparation for the Spring Tennoushou, Tokai Teio joins the spectators at another race, the Satsukishou. There, while watching Triple Crown hopeful Mihono Bourbon battle for first, she comes to a realization. Meanwhile, Mejiro McQueen cannot hide her frustration upon learning that the world has its money on Tokai Teio.

Special Week is working hard to keep her promise, but the Trainer wants her to rest instead, and has her go back home temporarily. The other members of Spica also work towards their goals.

After tasting her first defeat, Tokai Teio is listless for days. Finally, Trainer approaches her and tells her that, as Team Spica's leader, there is a place she must visit. Meanwhile, Mihono Bourbon has her attention focused on the upcoming Kikkkashou.

The Open Special is overflowing with spectators, and everyone has their eye on the turf, waiting for one horse girl to make her return after about a year.

The Trainer plans a summer training camp for the members of Spica to help get them get in even better shape. He sees Special Week and Silence Suzuka worrying too much about each other, and makes a plan to help them move forward.