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.

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 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.

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.

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.

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.

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...

Team Spica is stunned by BNW's outstanding performance at the Japanese Derby. Meanwhile, Tokai Teio is supposed to be focused on making her comeback in the Takarazuka Kinen, but ends up fracturing a bone for the third time. The doctor tells her that even after it heals, there's a chance she'll never get her old speed back again.

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.

The Japanese Derby is over, and Tokai Teio's injuries have landed her in rehabilitation. She's determined to recover by the Kikkashou, the last race she needs for the Triple Crown. Meanwhile Nice Nature throws herself into training with the rest of Team Canopus, determined to claim victory at the Kikkashou herself.

After many trials and tribulations, it is finally time for Team Spica to race in the Spring Tennoushou. Trainer acknowledges that Mejiro McQueen has the advantage when it comes to long distance, but it's hard to imagine Tokai Teio losing after all the growth she's shown. Come what may, everything will be decided at the finish line.

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...

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...

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.

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!

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.

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.

Both Mejiro McQueen and Rice Shower have been practicing hard for the Spring Tennoushou, but the gap between them only grows. Realizing that she has no hope for victory at this rate, Rice Shower disappears right before the race is set to begin.

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.

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.