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

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

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

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