After botching another match, bowling club captain Mai struggles to keep the club fun for all of its members.

The girls find themselves in the past facing immediate danger when a handsome young 'B' comes to their rescue.

The girls deal with Suguri's eccentric sisters while brainstorming ways to get home without affecting history.

Mai forgets her promise and asks Sumomo to build a bowling lane while Rina wrestles with her inner struggles.

After losing her ball while testing out a "plan B" to get home, Nozomi starts to find common ground with Anzu.

With bandits roaming nearby, the girls learn from their hosts about life and values in the Sengoku period.

The long-lost eldest sister Natsume unexpectedly returns home from her travels without her mysterious partner.

As they enjoy the hot spring and learn more about their hosts and each other, the girls uncover a new mystery.

The secret of the house is finally revealed and Mai suggests a way to decide which of the sisters gets to die.

The girls return to their time and start learning about their Sengoku friends and the history of the region.

The girls devise a strategy to rescue their Sengoku friends and defeat Kagetoki without having to kill anyone.

"I wonder if you'll believe me. It was a mysterious, heartwarming, kind of sad, and very, very special time."